TY - CONF A1 - Becker, Roland A1 - Esslinger, Susanne A1 - Jung, Christian A1 - Schröter-Kermani, C. A1 - Nehls, Irene T1 - Time courses of HBCD levels and enantiomeric signatures in herring gull eggs from the German coast T2 - 30 th International Symposium on Halogenated Persistent Organic Pollutants (Dioxin 2010) CY - San Antonio, TX, USA DA - 2010-09-12 PY - 2010 AN - OPUS4-21600 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Nehls, Irene A1 - Hanebeck, Olaf A1 - Becker, Roland A1 - Emmerling, Franziska T1 - N-(beta-carboxyethyl)-alpha-isoleucine N2 - The title compound, {2-[(2-carbamoylethyl)amino]-3-methylpentanoic acid}, C9H18N2O3, is of interest with respect to its biological activity. It was formed during an addition reaction between acrylamide and the amino acid isoleucine. The crystal structure is a three-dimensional network built up by intermolecular N–H···O and O–H···N hydrogen bonds. KW - Acrylamid KW - Isoleucin KW - Derivatisierung PY - 2013 DO - https://doi.org/10.1107/S160053681205146X SN - 1600-5368 VL - 69 IS - Part 2 SP - o172-o173, sup-1 - sup-7 PB - Munksgaard CY - Copenhagen AN - OPUS4-27573 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Becker, Roland A1 - Kalbe, Ute A1 - Sauer, Andreas ED - Moser, H. ED - Römbke, J. T1 - Selection and characterization of test samples and eluates KW - Municipial waste incineration ash KW - Gaswork contaminated soil KW - Copper-contaminated wood KW - Bulk material KW - Eluates KW - Ökotoxikologie KW - Biotests KW - Abfall KW - Europäische Normung (CEN) KW - Ringversuch PY - 2009 SN - 978-0-387-88958-0 DO - https://doi.org/10.1007/978-0-387-88959-7 N1 - Geburtsname von Sauer, Andreas: Buchholz, A. - Birth name of Sauer, Andreas: Buchholz, A. SP - 35 EP - 46 PB - Springer Science + Business Media AN - OPUS4-22944 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schallschmidt, Kristin A1 - Becker, Roland A1 - Jung, Christian A1 - Rolff, J. A1 - Fichtner, I. T1 - Investigation of cell culture volatilomes using solid phase micro extraction: options and pitfalls exemplified with adenocarcinoma cell lines N2 - Three strategies to sample volatile organic compounds (VOC) from lung cancer cell lines cultured in vitro were compared. Headspace solid phase microextraction was applied in situ to culture flasks and alternatively to subsamples of headspace gas or to nutrient solution subsamples followed by gas chromatography–mass spectrometry. The direct quantification of 55 VOC in the headspace of cell cultures was validated and is discussed with respect to reproducibility and system-related interferences. The role of the VOC background from culture media and usually employed polystyrene culture vessels is examined and was seen to invoke potentially misleading conclusions. The commercial A549 and two further adenocarcinoma cell lines displayed largely similar VOC profiles with distinct differences regarding certain individual substances. There is evidence for the inappropriateness of the standard cell culturing methods in the search for volatile cancer markers. KW - A549 KW - Lung cancer cell culture KW - GC–MS KW - SPME KW - VOC KW - Volatilome KW - Alcohol marker KW - Micropulverization KW - HPLC-MS/MS KW - Fortification KW - Long term stability PY - 2015 DO - https://doi.org/10.1016/j.jchromb.2015.10.004 SN - 0378-4347 SN - 1570-0232 SN - 1387-2273 SN - 1873-376X VL - 1006 SP - 158 EP - 166 PB - Elsevier B.V. CY - Amsterdam [u.a.] AN - OPUS4-34991 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Paul, Andrea A1 - Breitfeld, S. A1 - Sauer, Andreas A1 - Becker, Roland A1 - Kalbe, Ute A1 - Bremser, Wolfram A1 - Braun, Ulrike T1 - A Raman spectroscopic method for the monitoring of microplastics in soil N2 - Due to the increasing presence of microplastic particles (MP) in the Environment and the unknown risks arising from them, there is an urgent need for analytical methods that allow for an efficient identification and quantification of microplastics (MP), i.e. particles < 5 mm, in environmental samples. So far, mostly timeconsuming (micro) infrared or micro-Raman spectroscopic methods are applied. Here an faster alternative Approach is presented based on a Raman processspectrometer with fiber-optical probes in combination with multivariate data analysis. T2 - 12. Kolloquium Prozessanalytik CY - Berlin, Germany DA - 28.11.2016 KW - Raman spectroscopy KW - Microplastics KW - Soil KW - Chemometrics KW - PLS-DA PY - 2016 SP - P10, 59 EP - 60 AN - OPUS4-38392 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mönch, Bettina A1 - Becker, Roland A1 - Jung, Christian A1 - Nehls, Irene T1 - The homogeneity testing of EtG in hair reference materials: A high-throughput procedure using GC-NCI-MS N2 - The validation of a robust quantification procedure for EtG in hair using GC–NCI–MS is presented. Aqueous extraction is followed by complete lyophylization of the extract and derivatization with pentafluoropropionic anhydride (PFPA) under controlled temperature and duration. Clean-up of extracts was dispensable and standard single quadrupole MS displayed sufficient selectivity and sensitivity. The method displayed a wide linearity range and enabled LOD of 0.68 pg/mg, LOQ of 2.4 pg/mg, and precision below 8.12%. Since EtG was seen to display prolonged stability in the aqueous extracts and after derivatization with PFPA this straightforward procedure allows a routine throughput of large quantities of samples with little proneness to procedural scatter of results. The method was applied to demonstrate the homogeneity of two hair reference materials with mean EtG contents of 8.48 pg/mg and 22.0 pg/mg. Aside from the application in homogeneity studies of hair reference materials predominantly in the concentration range of 10–50 pg/mg the method was also designed for daily routine quantification of real-world sample with regard to drinking behavior assessment. KW - Extraction KW - Derivatization KW - High-throughput analysis KW - Reference materials KW - Homogeneity KW - Measurement uncertainty PY - 2013 DO - https://doi.org/10.1016/j.forsciint.2013.01.018 SN - 0379-0738 SN - 1872-6283 VL - 226 IS - 1-3 SP - 202 EP - 207 PB - Elsevier Ltd. CY - Amsterdam [u.a.] AN - OPUS4-27998 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ammann, Dominic A1 - Becker, Roland A1 - Kohl, Anka A1 - Hänisch, Jessica A1 - Nehls, Irene T1 - Degradation of the ethyl glucuronide content in hair by hydrogen peroxide and a non-destructive assay for oxidative hair treatment using infra-red spectroscopy N2 - The assessment of quantification results of the alcohol abuse marker ethyl glucuronide (EtG) in hair in comparison to the cut-off values for the drinking behavior may be complicated by cosmetic hair bleaching. Thus, the impact of increasing exposure to hydrogen peroxide on the EtG content of hair was investigated. Simultaneously, the change of absorbance in the range of 1000–1100 cm-1 indicative for the oxidation of cystine was investigated non-destructively by attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) using pulverized portions of the respective hair samples. Hair samples treated with hydrogen peroxide consistently displayed a significantly increased absorbance at 1040 cm-1 associated with the formation of cysteic acid. The EtG content decreased significantly if the hair was treated with alkaline hydrogen peroxide as during cosmetic bleaching. It could be shown that ATR-FTIR is capable of detecting an exposure to hydrogen peroxide when still no brightening was visible and already before the EtG content deteriorated significantly. Thus, hair samples suspected of having been exposed to oxidative treatment may be checked non-destructively by a readily available technique. This assay is also possible retrospectively after EtG extraction and using archived samples. KW - Hair testing KW - Oxidation KW - Bleaching KW - Cysteic acid KW - HPLC–MS/MS PY - 2014 DO - https://doi.org/10.1016/j.forsciint.2014.07.029 SN - 0379-0738 SN - 1872-6283 VL - 244 SP - 30 EP - 35 PB - Elsevier CY - Amsterdam [u.a.] AN - OPUS4-31755 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Becker, Roland A1 - Dorgerloh, Ute A1 - Paulke, E. A1 - Mumme, J. A1 - Nehls, Irene T1 - Hydrothermal carbonization of biomass: Major organic components of the aqueous phase N2 - Process waters obtained from hydrothermal carbonization (HTC) of wheat straw, a biogas digestate derived thereof, and four woody biomass feedstocks were quantified regarding the total organic carbon (TOC) and selected organic compounds. HTC runs revealed that TOC loads were largely unaffected by process severity or type of feedstock whereas the C2–C6 fatty acids, determined by GC, displayed clear effects of temperature and feedstock. HPLC demonstrated simultaneously the initial increase and subsequent consumption of cellulose-derived furfural and 5-hydroxymethylfurfural as well as the increase of the lignin-derived 2-methoxyphenol. 2-Methylbenzofuran, an example for a substance potentially harmful to aquatic biota, was observed in high concentration in the HTC liquor from wheat straw-based feedstocks. KW - Furfurals KW - Gas chromatography KW - Liquid chromatography KW - Phenols KW - Process water KW - Total organic carbon PY - 2014 DO - https://doi.org/10.1002/ceat.201300401 SN - 0930-7516 SN - 1521-4125 VL - 37 IS - 3 SP - 511 EP - 518 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-30333 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mönch, Bettina A1 - Becker, Roland A1 - Nehls, Irene T1 - Determination of ethyl glucuronide in hair: a rapid sample pretreatment involving simultaneous milling and extraction N2 - A combination of simultaneous milling and extraction known as micropulverized extraction was developed for the quantification of the alcohol marker ethyl glucuronide (EtG) in hair samples using a homogeneous reference material and a mixer mill. Best extraction results from 50 mg of hair were obtained with 2-mL plastic tubes containing two steel balls (Ø = 5 mm), 0.5 mL of water and with an oscillating frequency of 30 s-1 over a period of 30 min. EtG was quantified employing a validated GC-MS procedure involving derivatization with pentafluoropropionic acid anhydride. This micropulverization procedure was compared with dry milling followed by separate aqueous extraction and with aqueous extraction after manual cutting to millimeter-size snippets. Micropulverization yielded 28.0±1.70 pg/mg and was seen to be superior to manually cutting (23.0±0.83 pg/mg) and equivalent to dry grinding (27.7±1.71 pg/mg) with regard to completeness of EtG extraction. The option to process up to 20 samples simultaneously makes micropulverization especially valuable for the high throughput of urgent samples. KW - Ethyl glucuronide KW - Hair KW - Micropulverized extraction KW - GC-MS PY - 2014 DO - https://doi.org/10.1007/s00414-013-0939-z SN - 0937-9827 SN - 1437-1596 VL - 128 IS - 1 SP - 69 EP - 72 PB - Springer CY - Berlin ; Heidelberg AN - OPUS4-30063 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weber, M. A1 - Durmaz, V. A1 - Becker, Roland A1 - Esslinger, Susanne T1 - Predictive identification of Pentabromocyclododecene (PBCD) isomers with high binding affinity to hTTR N2 - The binding affinities of the six main hexabromocyclododecane (HBCD) stereoisomers and all of their possible 48 allylic pentabromocyclododecene (PBCD) metabolites to the endocrinous human transthyretin receptor (hTTR) were investigated and compared to the natural binder thyroxine, and the two brominated diphenyl ethers BDE-47 and 3-hydroxy-BDE-47. The endocrine disrupting potency was approximated by a combination of two methods: a surface matching with the natural binder thyroxine (T4) followed by approximation of free binding energies for various binding modes within hTTR. The results indicate slightly higher binding affinities for both BDE structures than for T4 itself and similarly high affinities for two trans-configurated PBCD isomers. For many other PBCD isomers, intermediate values were computed, whereas all HBCD diastereomers yielded significantly lower binding affinities. T2 - Dioxin 2009 - 29th International symposium on halogenated persistent organic pollutants / Organohalogen compounds CY - Beijing, China DA - 2009-08-23 KW - Flammschutzmittel KW - Thyroxin KW - Molecular modeling PY - 2009 UR - http://www.dioxin20xx.org/pdfs/2009/09-54.pdf VL - 71 SP - 000247 EP - 000252 CY - Beijing, China AN - OPUS4-20980 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, Axel A1 - Becker, Roland A1 - Braun, Ulrike A1 - Dorgerloh, Ute T1 - Einfluss der Alterung auf das Sorptionsverhalten von Mikroplastik, eine Laborstudie mit BTEX und Etherverbindungen N2 - Die Präsenz von Mikroplastik in aquatischen Ökosystemen ist ein globales Problem und steht zunehmend im Fokus der Öffentlichkeit. In mehreren Studien konnten Anreicherungen hydrophober, organischer Schadstoffe an MP nachgewiesen werden. Der Einfluss des Alterungszustandes der MP-Partikel auf das Sorptionsverhalten von hydrophoben organischen Substanzen ist nicht hinreichend geklärt. Ziel der vorliegenden Arbeit war die Untersuchung des Sorptionsverhaltens von Schadstoffen mit Bedeutung für limnische Gewässer an künstlich gealterten Partikeln relevanter Polymere. Das Modell verwendete die Aromaten Benzol, Toluol, Ethylbenzol und Xylol (BTEX) sowie Etherverbindungen. Diese Substanzen sind oder waren Bestandteile in unterschiedlichen Kraftstoffen und finden sich daher in vielen aquatischen Ökosystemen weltweit. Als Sorbentien kamen teilkristallines Polypropylen (PP) und amorphes Polystyrol (PS) in Form von Industriepellets zum Einsatz. Die Pellets wurden jeweils sowohl unbehandelt als auch mittels UV-Bestrahlung künstlich gealtert verwendet und mikroskopisch sowie mittels XPS, FTIR und DSC charakterisiert. Die Alterung führte bei PS zu einer verringerten Sorptionskapazität, während bei PP keine Veränderung im Sorptionsverhalten beobachtet wurde. T2 - Wasser 2017 - Jahrestagung der Wasserchemischen Gesellschaft CY - Donaueschingen, Germany DA - 22.05.2017 KW - Mikroplastik KW - Organische Schadstoffe KW - Sorption KW - Polypropylen Polystyrol PY - 2017 SN - 978-3-947197-01-9 SP - 1 EP - 606 PB - Gesellschaft Dt. Chemiker AN - OPUS4-40447 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Becker, Roland A1 - Buge, Hans-Gerhard A1 - Nehls, Irene T1 - The determination of adsorbable organically bound halogens (AOX) in soil: interlaboratory comparisons and reference materials N2 - The interlaboratory variability in the quantification of adsorbable organically bound halogens (AOX) in industrially contaminated soil is presented. Three consecutive rounds of a proficiency testing scheme, in which between 88 and 119 routine laboratories participated, yielded relative reproducibility standard deviations between 7 and 20% at AOX contents between 10.9 and 268 mg kg-1. Nineteen laboratories with established proficiency were invited to participate in the certification of the AOX content in three soil reference materials meant for the internal quality control in analytical laboratories. The certified values are (1349 ± 59) mg kg-1, (80 ± 7) mg kg-1 and (102 ± 8) mg kg-1, respectively. KW - Certified reference materials KW - European Reference Material KW - Proficiency testing KW - Organohalogen compounds KW - Summation parameter PY - 2007 DO - https://doi.org/10.1007/s00769-007-0308-z SN - 0949-1775 SN - 1432-0517 VL - 12 IS - 12 SP - 647 EP - 651 PB - Springer CY - Berlin AN - OPUS4-16670 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Scharkoi, O. A1 - Becker, Roland A1 - Esslinger, Susanne A1 - Weber, M. A1 - Nehls, Irene T1 - Predicting sites of cytochrome P450-mediated hydroxylation applied to CYP3A4 and hexabromocyclododecane N2 - This article describes a simple and quick in silico method for the prediction of cytochrome P450 (CYP)-mediated hydroxylation of drug-like compounds. Testosterone and progesterone, two known substrates of CYP3A4, are used to test the method. Further, we apply the procedure to predict sites of hydroxylation of isomers of the flame retardant hexabromocyclododecane by CYP3A4. Within the method, the compound is rotated in the binding pocket of the cytochrome, so that each hydrogen under consideration is placed near the active centre. Afterwards, short molecular dynamics simulations are provided for each step of the rotation. All steps of the simulation are compared concerning the distances between the hydrogens and the active centre and the corresponding energies. The computational results correlate well with experimental results. KW - Predicting sites of metabolism KW - Cytochrome P450 KW - Hydroxylation KW - Metabolism of HBCD PY - 2015 DO - https://doi.org/10.1080/08927022.2014.898845 SN - 0892-7022 SN - 1029-0435 VL - 41 IS - 7 SP - 538 EP - 546 PB - Gordon and Breach CY - New York, NY AN - OPUS4-30492 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Esslinger, Susanne A1 - Becker, Roland A1 - Nehls, Irene T1 - HBCD isomers: degradation rates and hydroxylated products from microsome incubation experiments T2 - Dioxin 2010 - 30th International symposium on halogenated persistent organic pollutants CY - San Antonio, TX, USA DA - 2010-09-12 PY - 2010 UR - http://www.dioxin20xx.org/pdfs/2010/10-1113.pdf N1 - Serientitel: Organohalogen Compounds – Series title: Organohalogen Compounds VL - 72 SP - 259 EP - 262 AN - OPUS4-23168 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Altmann, Korinna A1 - Braun, Ulrike T1 - Querschnittsthema Referenzmaterialien: Planung Ringversuche N2 - Nach einer Erläuterung der international üblichen Definitionen von Referenzmaterialien und Matrix-Referenzmaterialien erfolgt eine Zusammenfassung der spezifischen Anforderungen bei Herstellung und Charakterisierung. Weiterhin werden die unterschiedlichen Anforderungen an die Durchführung von Ringversuchen im Sinne eines Methodenvergleiches, einer Eignungsprüfung von Laboratorien und der Zertifizierung von Matrix-Referenzmaterialien gegenübergestellt. Für den aktuell geplanten ersten Ringversuch zur Quantifizierung von Mikroplastik in Schwebstoffen mittels thermischer Verfahren werden die konkreten technischen Bedingungen zur Herstellung entsprechender Referenzmaterialien einschließlich der Homogenitätsprüfung ihrer Mikroplastikgehalte dargestellt. Die Besonderheiten des Ringversuches vor dem Hintergrund einer Normung der eingesetzten Verfahren werden diskutiert. T2 - Forschungsschwerpunkt „Plastik in der Umwelt – Quellen • Senken • Lösungsansätze“: 2. Workshop des Querschnittsthemas „Analytik und Referenzmaterialien“ CY - Augsburg, Germany DA - 4.7.2018 KW - Mikroplastik KW - Referenzmaterialien KW - Ringversuche KW - Thermische Verfahren KW - Schwebstoffe KW - Methodenvergleich PY - 2018 AN - OPUS4-45681 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Köppen, Robert A1 - Becker, Roland A1 - Emmerling, Franziska A1 - Jung, Christian A1 - Nehls, Irene T1 - Enantioselective Preparative HPLC Separation of the HBCD-Stereoisomers from the Technical Product and Their Absolute Structure Elucidation Using X-Ray Crystallography N2 - 1,2,5,6,9,10-Hexabromocyclododecane (HBCD) is a widely used flame retardant, which tends to persist in the environment and accumulates in biota. The six stereoisomers (three racemates named α-, β-, and γ-HBCD) of the technical mixture were isolated with high-performance liquid chromatography (HPLC). Direct separations were performed on a chiral stationary phase containing permethylated -cyclodextrin (NUCLEODEX -PM column) and the pure enantiomers of α-, β-, and γ-HBCD were physically characterized for the first time. The absolute configurations of all six isomers were determined by anomalous dispersion using single crystal X-ray crystallography. Optical rotations αD in tetrahydrofuran were +4.2/-4.0 (α-HBCD), +26.1/-27.5 (β-HBCD), and +68.0/-66.3 (γ-HBCD). The sense of rotation could be correlated with the absolute configurations of α-, β-, and γ-HBCD enantiomers and their order of elution on a chiral permethylated β-cyclodextrin-bonded stationary phase. The diastereomers α-, β-, and γ-HBCD displayed distinctly different melting points as well as 1H-, 13C NMR, and IR spectra. KW - Brominated flame retardant KW - Chiral separation KW - Anomalous dispersion KW - Crystal structures KW - Optical rotation KW - Absolute configuration PY - 2007 DO - https://doi.org/10.1002/chir.20366 SN - 0899-0042 SN - 1520-636X VL - 19 IS - 3 SP - 214 EP - 222 PB - Wiley-Liss CY - New York, NY AN - OPUS4-14718 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mönch, Bettina A1 - Emmerling, Franziska A1 - Kraus, Werner A1 - Becker, Roland A1 - Nehls, Irene T1 - n-Propyl 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside N2 - The title compound [systematic name: (2R,3R,4S,5R,6R) 2-(acetoxymethyl)-6-propoxytetrahydro-2H-pyran-3,4,5-triyl triacetate], C17H26O10, was formed by a Koenigs-Knorr reaction of 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide and n-propanol. The central ring adopts a chair conformation. The crystal does not contain any significant interactions such as hydrogen bonds. PY - 2013 DO - https://doi.org/10.1107/S1600536812051495 SN - 1600-5368 VL - 69 IS - Part 2 SP - o158, sup-1 - sup-7 PB - Munksgaard CY - Copenhagen AN - OPUS4-27439 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Becker, Roland A1 - Dorgerloh, Ute A1 - Sauer, Andreas A1 - Hofmann, Andrea T1 - Quality control in extended measurement campaigns: selection of contract laboratories by proficiency testing exemplified for the trace analysis of anilines in groundwater N2 - An interlaboratory comparison for the determination of aniline, nine methylated anilines and chlorinated anilines in contaminated groundwater (each compound between 1 µg L-1 and 750 µg L-1) was conducted as proficiency test for the selection of contract laboratories for a groundwater monitoring campaign. For the 13 participants, two different test sample series were prepared from a stabilized real case groundwater. Series A was the groundwater as sampled in the field and series B was prepared from series A by spiking with selected anilines. Homogeneity and stability investigations revealed that contaminated groundwater provides a viable basis for the preparation of ring test samples for the determination of anilines. Analytical procedures were limited to the standardized liquid–liquid extraction or solid-phase extraction in combination with gas chromatography/mass spectrometry (DIN 38407-16:1999). The robust consensus values were evaluated according to the standardized protocol of DIN 38402-45:2013. Robust reproducibility standard deviations ranged largely between 20?% and 60?% depending on the analyte. The proficiency assessment of individual participants combined the qualitative aspect of correct peak identification with the quantitative determination of individual concentrations within set limits in a unified approach. It could be shown that the accreditation status of laboratory and the existence of a standardized analytical procedure do not substitute a problem-related proficiency assessment of potential contractors. KW - Aniline KW - Chloroanilines KW - Methylanilines KW - Groundwater KW - Interlaboratory comparison KW - Proficiency test PY - 2014 DO - https://doi.org/10.1007/s00769-014-1072-5 SN - 0949-1775 SN - 1432-0517 N1 - Geburtsname von Sauer, Andreas: Buchholz, A. - Birth name of Sauer, Andreas: Buchholz, A. VL - 19 IS - 5 SP - 371 EP - 376 PB - Springer CY - Berlin AN - OPUS4-31756 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Scharf, Holger A1 - Becker, Roland A1 - Bremser, Wolfram A1 - Buge, Hans-Gerhard A1 - Lück, Detlef T1 - Certification of the mass fractions of trace elements and pentachlorophenol in an impregnated wood reference material N2 - The resource-saving utilisation of recovered waste wood is a matter of growing concern. In several European countries, this utilisation is governed by regulations and is dependent on the contents of certain trace elements and organic compounds. Thus, for decisionmaking with respect to waste wood management (recycling or combustion), reliable analytical data are needed and, due to their great economic and environmental impact, must be assured by appropriate quality control. To support the improvement in quality assurance in waste wood analysis, for the first time, a wood reference material was certified for its mass fractions of arsenic, cadmium, chromium, copper, lead, mercury, and pentachlorophenol (PCP). These analytes were selected because they represent typical constituents of wood preservatives most widely used in the past. Material preparation and testing of homogeneity and stability were carried out by BAM Federal Institute for Materials Research and Testing. The certification measurements were performed involving selected laboratories with documented expertise in the field of waste wood analysis. The certified values and their corresponding uncertainties were assigned in full compliance with the requirements of ISO Guide 35. The certified mass fractions and their expanded uncertainties (k/i> = 2) are as follows: (3.1 ± 0.5) mg/kg for As, (3.02 ± 0.24) mg/kg for Cd, (36.4 ± 2.6) mg/kg for Cr, (22.9 ± 1.7) mg/kg for Cu, (0.60 ± 0.14) mg/kg for Hg, (39 ± 4) mg/kg for Pb, and (7.9 ± 0.6) mg/kg for PCP. The certified material is available as European Reference Material ERM®-CD100. KW - Waste wood KW - Trace elements KW - Pentachlorophenol KW - Certification KW - European reference material PY - 2010 DO - https://doi.org/10.1007/s00769-010-0699-0 SN - 0949-1775 SN - 1432-0517 VL - 15 IS - 11 SP - 613 EP - 619 PB - Springer CY - Berlin AN - OPUS4-22392 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Riddell, N. A1 - Becker, Roland A1 - Chittim, B. A1 - Emmerling, Franziska A1 - Köppen, Robert A1 - Lough, A. A1 - McAlees, A. A1 - McCrindle, R. T1 - Preparation and X-ray structural characterization of further stereoisomers of 1,2,5,6,9,10-hexabromocyclododecane N2 - Technical 1,2,5,6,9,10-hexabromocyclododecane (HBCD) consists largely of three diastereomers (α-, β-, and γ-HBCD) produced by the trans addition of bromine to cis,trans,trans-cyclododeca-1,5,9-triene (CDT). However, another seven diastereomers are theoretically possible and may be produced by trans addition of bromine across the double bonds of the other three isomers of 1,5,9-CDT. There are indications that small amounts of the minor HBCD isomers may be present in commercial HBCD mixtures or in products containing this brominated flame retardant (BFR). Such minor components may indeed derive from traces of other 1,5,9-CDTs in the cis, trans, trans starting material, however their formation may also be possible through isomerizations during the processing of this BFR or by bioisomerization subsequent to its release into the environment. Two of the seven additional diastereomers (δ- and ε-HBCD) were synthesized previously from trans,trans,trans-CDT. We now report the preparation of the remaining five diastereomers, ζ-, η-, and θ-HBCD from cis,cis,trans-CDT and ι- and κ-HBCD from cis,cis,cis-CDT, and their characterization by 1H NMR spectroscopy and X-ray crystallography. The availability of these further diastereomers of HBCD should aid in determining if the minor isomers are present in commercial samples of this BFR, in products containing HBCDs, or in environmental samples. We have also carried out an X-ray crystal structure determination on ε-HBCD, so that crystal structures are now available for all 10 HBCD diastereomers. KW - Brominated flame retardants KW - HBCDs KW - Minor isomers KW - X-ray PY - 2011 DO - https://doi.org/10.1016/j.chemosphere.2011.06.014 SN - 0045-6535 SN - 0366-7111 VL - 84 IS - 7 SP - 900 EP - 907 PB - Elsevier Science CY - Kidlington, Oxford AN - OPUS4-24298 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Becker, Roland A1 - Buge, Hans-Gerhard A1 - Bremser, Wolfram A1 - Nehls, Irene T1 - Mineral oil content in sediments and soils: comparability, traceability and a certified reference material for quality assurance N2 - The performance of twelve laboratories with previously established proficiency in the determination of the mineral oil content in a fresh water sediment is described. The summation parameter total petrol hydrocarbon (TPH) is defined according to ISO 16703:2004 with regard to the sample preparation to be applied, the flame ionisation detection (FID) and the boiling range of C10–C40 to be integrated. Comprehensive tests of homogeneity and stability have been carried out on the candidate material using appropriate models. The outcome of the study served as the basis for the certification of the candidate reference material as ERM-CC015a. The certified mass fraction is 1,820±130mgkg-1 and traceability was established by using an appropriate calibration standard certified for the mass fraction of C10–C40. The interlaboratory scatter of measurement results in this exercise can largely be explained by the variability of the individual calibrations based on this common calibration standard. KW - Total petroleum hydrocarbons KW - Extraction KW - Gas chromatography KW - Calibration KW - Interlaboratory study PY - 2006 DO - https://doi.org/10.1007/s00216-006-0423-4 SN - 1618-2642 SN - 1618-2650 VL - 385 IS - 3 SP - 645 EP - 651 PB - Springer CY - Berlin AN - OPUS4-12399 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Köppen, Robert A1 - Becker, Roland A1 - Emmerling, Franziska A1 - Jung, Christian A1 - Nehls, Irene T1 - HBCD enantiomers: absolute configurations and thermal rearrangement T2 - Organohalogen Compounds PY - 2006 UR - http://www.dioxin20xx.org/pdfs/2006/06-466.pdf VL - 68 SP - 1991 EP - 1994 PB - Norwegian Institute of Public Health AN - OPUS4-14540 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Sauer, Andreas A1 - Scharf, Holger A1 - Becker, Roland T1 - Bericht zum 19. BAM-Ringversuch "Altlasten" N2 - Präsentation der Ergebnisse eines Ringversuchs zur Kompetenzbewertung von Prüflaboratorien auf dem Gebiet der anorganischen und organischen Bodenanalytik. KW - Eignungsprüfung KW - Boden KW - MKW KW - PAK KW - Gesamtcyanid KW - Spurenelemente KW - Proficiency testing KW - Soil KW - TPH KW - PAH KW - Total cyanide KW - Trace elements PY - 2013 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-356963 SP - 1 EP - 233 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-35696 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Sauer, Andreas A1 - Scharf, Holger A1 - Becker, Roland T1 - Bericht zum 22. BAM-Ringversuch "Altlasten" N2 - Präsentation der Ergebnisse eines Ringversuchs zur Kompetenzbewertung von Prüflaboratorien auf dem Gebiet der anorganischen und organischen Bodenanalytik: Polyzyklische aromatische Kohlenwasserstoffe (PAK) in Boden, Mineralölkohlenwasserstoffe (MKW) in Boden, Elemente in Sediment und Gesamtcyanid in Boden. KW - Eignungsprüfung KW - Boden KW - Spurenelemente KW - Gesamtcyanid KW - MKW KW - PAK PY - 2016 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-398676 SP - 1 EP - 261 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-39867 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Sauer, Andreas A1 - Scharf, Holger A1 - Becker, Roland T1 - Bericht zum 17. BAM-Ringversuch "Altlasten" N2 - Präsentation der Ergebnisse eines Ringversuchs zur Kompetenzbewertung von Prüflaboratorien auf dem Gebiet der anorganischen und organischen Bodenanalytik. KW - Eignungsprüfung KW - Boden KW - PAK KW - MKW KW - AOX KW - Spurenelemente KW - Gesamtcyanid KW - Proficiency testing KW - Soil KW - PAH KW - TPH KW - Trace elements KW - Total cyanide PY - 2011 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-357785 SP - 1 EP - 212 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-35778 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Emmerling, Franziska A1 - Becker, Roland A1 - Reck, Günter T1 - Mixed crystal of bis(µ2-N,N-di-n-butyldithiocarbamato-S,S,S')-bis(N,N-di-n-butyldithiocarbamato-S,S')-di-zinc(II) and bis(µ2-N,N-di-n-butyldithiopercarbamato-S,O,O')-bis(N,N-di-n-butyldithiocarbamato-S,S')-di-zinc(II) N2 - The title compounds Zn2[S2CN(n-C4H9)2]4 1 and Zn2[(S(SO)CN(n-C4H9)2)(S2CN(n-C4H9)2)]2 3 build mixed crystals in the ratio 0.42: 0.58. Each compound forms dimers, in which the monomer moieties are related via a two-fold axis, coinciding with that of the monoclinic space group C2/c. The lattice parameters are a = 23.581(9), b = 17.112(5), c = 16.372(9) Å, and β = 128.33(3)°. KW - Crystal structure KW - Zinc KW - Dithiocarbamate KW - Dithiopercarbamate PY - 2007 DO - https://doi.org/10.1002/crat.200710956 SN - 0023-4753 SN - 1521-4079 SN - 0232-1300 VL - 42 IS - 10 SP - 1018 EP - 1023 PB - Wiley-VCH Verlag GmbH & Co. KGaA CY - Weinheim AN - OPUS4-17843 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weber, M. A1 - Becker, Roland A1 - Köppen, Robert A1 - Durmaz, V. T1 - Classical hybrid Monte-Carlo simulations of the interconversion of hexabromocyclododecane N2 - In this paper, we investigate the interconversion processes of the major flame retardant - 1,2,5,6,9,10-hexabromocyclododecane (HBCD) - by the means of statistical thermodynamics based on classical force-fields. Three ideas will be presented. First, the application of classical hybrid Monte-Carlo simulations for quantum mechanical processes will be justified. Second, the problem of insufficient convergence properties of hybrid Monte-Carlo methods for the generation of low temperature canonical ensembles will be solved by an interpolation approach. Furthermore, it will be shown how free energy differences can be used for a rate matrix computation. The results of our numerical simulations will be compared to experimental results. KW - Markov process KW - Molecular dynamics KW - Rate matrix PY - 2007 SN - 1438-0064 VL - 07-31 SP - 1 EP - 18 PB - ZIB CY - Berlin AN - OPUS4-17841 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Köppen, Robert A1 - Nehls, Irene A1 - Weber, M. A1 - Durmaz, V. T1 - HBCD Stereosiomers: Thermal interconversion and enantiospecific trace analysis in biota T2 - DIOXIn 2008 (28th symposium on halogenated persistent organic compounds) CY - Birmingham, England DA - 2008-08-17 PY - 2008 AN - OPUS4-17664 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Krysell, M. A1 - Becker, Roland A1 - Wegener, J. W. A1 - Buge, Hans-Gerhard T1 - Certified reference materials for organic contaminants in sewage sludge - a feasibility study N2 - As an answer to the re-evaluation of the European sludge directive, two novel reference materials for organic components in municipal sludge have been produced and test certified for AOX (absorbable organic halogens), PAH (polycyclic aromatic hydrocarbons), NPE (nonylphenol and nonylphenolethoxylates), DEHP (di(2-ethylhexyl)phthalate), bisphenol A, and BFR (brominated flame retardants). The materials were prepared from raw sludge without spiking or mixing of different sludges. The study demonstrated that the technique for the preparation of a suitable reference material, sufficiently homogenous and stable, and with concentration levels that answer the needs of the laboratories and the relevant authorities, can now be presented in detail. The results, furthermore, show there is a need for method validation and standardisation of the measurements of NPEs and certain BFR congeners, and that the development of the laboratory structure in Europe, with fewer and more specialised laboratories, might become a major obstacle when trying to find a sufficient number of laboratories being appropriately proficient for this kind of study in the future. KW - Organic pollutants KW - Municipal sludge KW - CRM KW - AOX KW - BPA KW - PAH KW - DEHP KW - NPE KW - BFR PY - 2008 DO - https://doi.org/10.1007/s00769-008-0431-5 SN - 0949-1775 SN - 1432-0517 VL - 13 IS - 10 SP - 553 EP - 562 PB - Springer CY - Berlin AN - OPUS4-18362 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weber, M. A1 - Becker, Roland A1 - Durmaz, V. A1 - Köppen, Robert T1 - Classical hybrid Monte-Carlo simulation of the interconversion of hexabromocyclododecane stereoisomers KW - HBCD KW - Isomerisation KW - Statistical thermodynamics KW - Kinetics PY - 2008 DO - https://doi.org/10.1080/08927020802208968 SN - 0892-7022 SN - 1029-0435 VL - 34 IS - 6-7 SP - 727 EP - 736 PB - Gordon and Breach CY - New York, NY AN - OPUS4-18261 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Esslinger, Susanne A1 - Müller-Belecke, A. A1 - Jung, Christian A1 - Nehls, Irene T1 - Bioisomerization of HBCD: Results of feeding experiments with pure gamma-HBCD enantiomers T2 - 29th International Symposium on Halogenated Persistent Organic Pollutants (Dioxin 2009) CY - Beijing, China DA - 2009-08-23 PY - 2009 AN - OPUS4-19655 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Weber, M. A1 - Durmaz, V. A1 - Esslinger, Susanne T1 - Predictive identification of pentabromocyclododecane (PBCD) isomers with high binding affinity to hTTR T2 - 29th International Symposium on Halogenated Persistent Organic Pollutants (Dioxin 2009) CY - Beijing, China DA - 2009-08-23 PY - 2009 AN - OPUS4-19656 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Nehls, Irene A1 - Schallschmidt, Kristin A1 - Becker, Roland A1 - Fischer-Tenhagen, C. A1 - Johnen, D. A1 - Leschber, G. A1 - Frese, S. A1 - Neudecker, J. A1 - Walles, T. ED - Schüler, C. ED - Püschel, K. T1 - BIOAIR - Ein interdisziplinäres Projekt zur Bestimmung von Krebsmarkern in der Atemluft N2 - Wie viele Forschergruppen, haben auch wir uns das langfristige Ziel gesetzt, einen Beitrag bei der Beantwortung der Frage zu leisten, was Hunde riechen, wenn sie Krebs erschnüffeln. Dabei sollen die Hunde nicht nur anzeigen, ob eine Atemluftprobe positiv oder negativ ist, sondern sie sollen auch aktiv eingebunden werden in den systematischen Suchprozess nach detektierbaren Biomarkern. So ist geplant, dass mittels eines präparativen Fraktionssammlers definierte Schnitte des Gaschromatogramms einzeln oder in möglichen Kombinationen auf das Adsorbervlies gebracht werden, um im Hundetraining eingesetzt zu werden. In analoger Weise könnte auch mit spezifischen Kandidatensubstanzen verfahren werden. PY - 2015 SN - 978-3-8300-8763-2 N1 - Serientitel: Forschungsergebnisse aus dem Institut für Rechtsmedizin der Universität Hamburg – Series title: Forschungsergebnisse aus dem Institut für Rechtsmedizin der Universität Hamburg VL - 30 SP - 93 EP - 101 PB - Dr. Kovac AN - OPUS4-33165 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dorgerloh, Ute A1 - Theissen, H. A1 - Becker, Roland A1 - Hilbert, S. A1 - Nehls, Irene T1 - Probennahme und Quantifizierung von LHKW, Ethen und Methan in Grundwasser N2 - Der Einsatz aktiver (Pumpprobennahme, Schöpfprobennahme) und passiver (Diffusionsprobennahme) Probennahmetechniken zur Gehaltsbestimmung von LHKW sowie Ethen und Methan in Grundwasser wird aus ordnungsbehördlicher Sicht hinsichtlich der Vergleichbarkeit von Analysendaten untersucht. Am Beispiel einer Kontamination mit Trichlorethen sowie 1,2-Dichlorethen und Vinylchlorid kann deutlich gemacht werden, dass die Einsatzmöglichkeit der passiven Probennahme durch unzureichende Strömungsverhältnisse im Aquifer sowie biologische Aktivität im Pegelrohr begrenzt ist. Der aktiven Probennahme ist bei ungeklärten oder unzureichenden Strömungsverhältnissen im Grundwasserleiter daher der Vorzug zu geben. Das gaschromatographische Verfahren für Vinylchlorid mittels Dampfraumtechnik wird um die Quantifizierung von Methan und Ethen erweitert. Dabei werden für die Bewertung von Altlasten relevante Bestimmungsgrenzen von 0,1 µg/l (Vinylchlorid, Ethen) sowie 5 µg/l (Methan) erreicht. Aus der Validierung der Analysenmethode und den Ergebnissen verschiedener Probennahmen werden Toleranzbereiche für die Ergebnisse eines Grundwassermonitorings abgeschätzt. Diese Streubreiten von Monitoring- Ergebnissen sollten von Ingenieurbüros und zuständigen Ordnungsbehörden bei der Bewertung der komplexen Abbauprozesse eines LHKW-Grundwasserschadens beachtet werden. KW - Passive sampling KW - Active sampling KW - Groundwater KW - Trichloroethene KW - Vinyl chloride KW - Methane PY - 2010 DO - https://doi.org/10.1007/s00767-010-0144-7 SN - 1430-483X VL - 15 IS - 4 SP - 231 EP - 239 PB - Springer CY - Berlin ; Heidelberg AN - OPUS4-22617 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mönch, Bettina A1 - Emmerling, Franziska A1 - Kraus, Werner A1 - Becker, Roland A1 - Nehls, Irene T1 - Isopropyl 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside N2 - The title compound, C17H26O10, was formed by a Koenigs-Knorr reaction of 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide and propan-2-ol. The central ring adopts a chair conformation. The crystal does not contain any significant intermolecular interactions. PY - 2013 DO - https://doi.org/10.1107/S1600536812051483 SN - 1600-5368 VL - 69 IS - Part 2 SP - o157, sup-1 - sup-7 PB - Munksgaard CY - Copenhagen AN - OPUS4-27572 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Becker, Roland A1 - Reck, Günter A1 - Radeglia, Reiner A1 - Springer, A. A1 - Schulz, Burkhard T1 - Designed self-assembly of a bimolecular calix[4]resorcinarene capsule held together by hydrogen bonds N2 - The X-ray crystallographic study of the macrocyclic tetrakis-N[N-2-hydroxyethyl-piperazino]calix[4]resorcinarene·3CH3CH2OH·H2O (3) reveals a self-assembled dimeric capsule-like complex held together by an array of intermolecular hydrogen bonds. Pairs of concave molecules associate directly in bowl-to-bowl fashion and enclose an accessible supramolecular cavity of Å3 hosting one water and three ethanol molecules. The supramolecular arrangement displays alternating layers of facing bowls and interlocking lower rim aliphatic moieties. The helical conformation of the 2-hydroxyethyl piperazinomethyl moieties displays chirality of a bimolecular capsule frozen in the solid state. 3 crystallises in the triclinic space group P-1 with two symmetry independent molecules in the asymmetric unit. Two enantiomeric capsules form a racemic pair in the unit cell. KW - Hydrogen bonded molecular capsule KW - Conformational chirality KW - Calix[4]resorcinarenes KW - Crystal structure PY - 2006 DO - https://doi.org/10.1016/j.molstruc.2005.08.027 SN - 0022-2860 SN - 1872-8014 SN - 0377-046X VL - 784 IS - 1-3 SP - 157 EP - 161 PB - Elsevier CY - Amsterdam AN - OPUS4-12241 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krysell, M. A1 - Becker, Roland A1 - Wegener, J. W. A1 - Benanou, D. A1 - Ringstad, O. A1 - van Leeuwen, St. A1 - Leslie, H. T1 - Feasibility study for certified reference materials for organic compounds in sewage sludge (SLUDGESUPPORT) T2 - 10th Internatiaonal Symposium on Biological and Environmental Reference Materials (BERM-10) CY - Charleston, SC, USA DA - 2006-04-30 PY - 2006 AN - OPUS4-12283 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Köppen, Robert A1 - Emmerling, Franziska A1 - Kohl, Anka A1 - Becker, Roland T1 - Delta-Hexabromocyclododecane N2 - (1R,2S,5R,6S,9S,10R)-Hexabromocyclododecane (C12H18Br6, d-HBCD) was crystallized from acetonitrile. The C—Br distances range from 1.962 (8) to 1.982 (8) Å and intermolecular Br...Br contacts contribute to the formation of layers. PY - 2007 DO - https://doi.org/10.1107/S1600536807026396 SN - 1600-5368 VL - 63 IS - 7 SP - o3105 PB - Munksgaard CY - Copenhagen AN - OPUS4-15048 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Reck, Günter A1 - Becker, Roland A1 - Walther, G. T1 - Crystal structures of two polymorphic forms of bis-(zinc-dibutyldithiopercarbamate) PY - 1995 SN - 0044-2968 VL - 210 SP - 769 EP - 774 PB - Oldenbourg CY - München AN - OPUS4-14852 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Ammann, Dominic A1 - Kohl, Anka A1 - Nehls, Irene T1 - Degradation of Ethyl glucuronide by hydrogen peroxide and a non-destructive assay for oxidative hair treatment using infra-red spectroscopy T2 - 19th Meeting of the Society of Hair Testing CY - Bordeaux, France DA - 2014-06-11 PY - 2014 AN - OPUS4-30747 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Esslinger, S. A1 - Maul, Ronald A1 - Nehls, Irene T1 - Hydroxylierte Derivate des Flammschutzmittels Hexabromcyclododecan: Beiträge zu Charakterisierung und Analytik in Biota T2 - ANAKON 2011 (ETH Zürich) CY - Zurich, Switzerland DA - 2011-03-22 PY - 2011 AN - OPUS4-23000 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Moser, H. A1 - Roembke, J. A1 - Donnevert, G. A1 - Becker, Roland T1 - Evaluation of biological mehtods for a future methodological implementation of the hazard criterion H14 'ecotoxic' in the European waste list (2000/532/EC) N2 - The ecotoxicological characterization of waste is part of its assessment as hazardous or non-hazardous according to the European Waste List. For this classification 15 hazard criteria are derived from the Council Directive 91/689/EEC on hazardous waste. Some of the hazard criteria are based on the content of dangerous substances. The criterion H14 'ecotoxic' lacks of an assessment and testing strategy and no specific threshold values have been defined so far. Based on the recommendations of CEN guideline 14735 (2005), an international round robin test (ring test) was organized by the German Federal Environment Agency in order to define suitable test methods for the biological assessment of waste and waste eluates. A basic test battery, consisting of three aquatic and three terrestrial tests, was compiled. In addition, data were submitted for ten additional tests (five aquatic (including a genotoxicity test) and five terrestrial ones). The tests were performed with three representative waste types: an ash from an incineration plant, a soil containing high concentrations of organic contaminants (polycyclic aromatic hydrocarbons) and a preserved wood waste. The results of this ring test confirm that a combination of a battery of biological tests and chemical residual analysis is needed for an ecotoxicological characterization of wastes. With small modifications the basic test battery is considered to be well suitable for the hazard and risk assessment of wastes and waste eluates. All results and documents are accessible via a web-based data bank application. KW - European waste list KW - Waste legislation KW - Bio test battery KW - Ring test structure KW - Interlaboratory comparison KW - Waste ecotoxicity PY - 2011 DO - https://doi.org/10.1177/0734242X10367844 SN - 0734-242X SN - 1096-3669 VL - 29 IS - 2 SP - 180 EP - 187 PB - Sage CY - London AN - OPUS4-23271 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Scharkoi, O. A1 - Esslinger, Susanne A1 - Weber, M. A1 - Nehls, Irene T1 - Phase I Oxidation of alpha- and gamma-Hexabromocyclodeodecane by Cytochrome P450 Enzymes: Simulation of the Stereoisomerism of Hydroxylated Metabolites T2 - DIOXIN 2011, 31st International Symposium on Halogenated Persistent Organic Pollutants CY - Brussels, Belgium DA - 2011-08-21 PY - 2011 AN - OPUS4-23823 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Koon, M. A1 - Helmis, Mario A1 - Wirth, B. A1 - Funke, A. A1 - Mumme, J. T1 - Bewertung von HTC-Kohle für ihre Eignung zur Verbesserung von Bodeneigenschaften T2 - First INTERREG NSR Biochar conference - Biokohle - Klimaretter oder Mogelpackung? Biochar - Climate Savior or Bluff Package? 72. Symposium des ANS e. V., FU BErlin CY - Berlin, Germany DA - 2011-10-05 PY - 2011 AN - OPUS4-24456 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Gebert, A. A1 - Jung, Christian A1 - Nehls, Irene A1 - Gabsch, T. A1 - Egel, E. T1 - Determination of the proteinaceous binder component and soluble nylon preservative in Central Asian mural paintings using GC-MS T2 - "Auf Grünwedels Spuren - Restaurierung und Forschung an zentralasiatischen Wandmalereien" (Ausstellung des Museums für Asiatische Kunst, Berlin) CY - Berlin, Germany DA - 2011-12-10 PY - 2011 AN - OPUS4-24703 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Mönch, Bettina A1 - Ammann, Dominic A1 - Nehls, Irene T1 - Quantification of ethyl glucuronide in hair: The effect of milling and sonication on the extraction efficiency T2 - 18th Meeting of the Society of Hair Testing CY - Geneva, Switzerland DA - 2013-08-28 PY - 2013 AN - OPUS4-28722 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland T1 - External quality control: a way to improve reliability in hair analysis T2 - 18th Meeting of the Society of Hair Testing CY - Geneva, Switzerland DA - 2013-08-28 PY - 2013 AN - OPUS4-28723 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Sauer, Andreas A1 - Scharf, Holger A1 - Becker, Roland T1 - Bericht zum 20. BAM-Ringversuch "Altlasten" N2 - Präsentation der Ergebnisse eines Ringversuchs zur Kompetenzbewertung von Prüflaboratorien auf dem Gebiet der anorganischen und organischen Bodenanalytik. KW - Eignungsprüfung KW - Boden KW - MKW KW - PAK KW - Spurenelemente KW - Chrom(VI) KW - Proficiency testing KW - Soil KW - TPH KW - PAH KW - Trace elements KW - Chromium(VI) PY - 2014 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-356424 SP - 1 EP - 228 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-35642 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dorgerloh, Ute A1 - Becker, Roland A1 - Kaiser, M. T1 - Evidence for the formation of difluoroacetic acid in chlorofluorocarbon-contaminated ground water N2 - The concentrations of difluoroacetic acid (DFA) and trifluoroacetic acid (TFA) in rainwater and surface water from Berlin, Germany resembled those reported for similar urban areas, and the TFA/DFA ratio in rainwater of 10:1 was in accordance with the literature. In contrast, nearby ground water historically contaminated with 1,1,2-trichloro-1,2,2-trifluoroethane (R113) displayed a TFA/DFA ratio of 1:3. This observation is discussed versus the inventory of microbial Degradation products present in this ground water along with the parent R113 itself. A microbial Transformation of chlorotrifluoroethylene (R1113) to DFA so far has not been reported for environmental media, and is suggested based on well-established mammalian metabolic pathways. KW - Fluoroacetic acid KW - DFA KW - TFA KW - Rainwater KW - Ground water KW - Degradation of refrigerants PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-475569 DO - https://doi.org/10.3390/molecules24061039 SN - 1420-3049 VL - 24 IS - 6 SP - 1039, 1 EP - 6 PB - MDPI CY - Basel AN - OPUS4-47556 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Roland A1 - Sauer, Andreas A1 - Kalbe, Ute T1 - Sample preparation and analytical results T2 - Internationaler CEN/DIN-Workshop im Rahmen des Vh 1287 (Ökotox-Ringversuch), PTB, DIN CY - Berlin, Germany DA - 2007-06-29 PY - 2007 N1 - Geburtsname von Sauer, Andreas: Buchholz, A. - Birth name of Sauer, Andreas: Buchholz, A. AN - OPUS4-16130 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -