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 JF - Analytical and bioanalytical chemistry 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 - Proceedings of Organohalogen Compounds 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) JF - Crystal research and technology 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 JF - ZIB-Report 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) 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 JF - Accreditation and quality assurance 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 JF - Molecular simulation 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 -