TY - CONF A1 - Piechotta, Christian T1 - Chemische Brandspurenanalytik - Methoden zum Nachweis von Brandbeschleunigern in Brandrückständen T2 - ANAKON 2011 CY - Zurich, Switzerland DA - 2011-03-22 PY - 2011 AN - OPUS4-23251 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Janzen, R. A1 - Sperling, M. A1 - Buscher, W. A1 - Bösel, A. A1 - Ehlbeck, J. A1 - Lischka, Susanne A1 - Piechotta, Christian T1 - Spezies-Analyse von Quecksilber-, Zinn- und Bleiverbindungen - Neues GC-MIP-OES-System N2 - Quecksilber-, Blei- und Zinnverbindungen gehören aufgrund Ihrer Toxizität zu den bedrohlichsten Umweltkontaminationen. Dabei können besonders die organischen Verbindungen bereits in kleinsten Mengen überaus schwerwiegende Folgen für Lebewesen verursachen. Während die anorganischen (mineralischen) Verbindungen dieser Elemente auch durch natürliche Prozesse wie Erosion aus Gestein und durch Vulkanismus in die Umwelt eingetragen werden, entstehen die meisten Kontaminationen der Umwelt aufgrund ihres jahrzehntelangen weltweiten Einsatzes in verschiedenen Pestiziden, Antifouling Anstrichen, Treibstoffen und zahlreichen industriellen Großprozessen, sowie ihrer Emission bei der Verfeuerung fossiler Brennstoffe. KW - GC-PED KW - Methylquecksilber KW - MIP PY - 2011 SN - 0016-3538 VL - 1 SP - 22 EP - 27 PB - GIT-Verlag CY - Darmstadt AN - OPUS4-23374 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kuhlich, Paul A1 - Göstl, Robert A1 - Teichert, Philip A1 - Piechotta, Christian A1 - Nehls, Irene T1 - Transformations of polycyclic musks AHTN and HHCB upon disinfection with hypochlorite: two new chlorinated disinfection by-products (CDBP) of AHTN and a possible source for HHCB-lactone N2 - In this work, the behavior of the polycyclic musks 6-acetyl-1,1,2,4,4,7-hexamethyltetraline (AHTN) and 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta- γ-2-benzopyran (HHCB) was investigated upon disinfection by using sodium hypochlorite as disinfectant in a model disinfection basin in order to find new disinfection byproducts (DBP). In the case of AHTN, the carboxylic acid 3,5,5,6,8,8-hexamethyl-5,6,7,8-tetrahydronaphthalene-2- carboxylic acid (AHTN-COOH) was generated by a haloform reaction, being the origin for two new chlorinated DBPs. In the case of HHCB, disinfection via hypochlorite led to the HHCB-lactone. All reaction products and intermediates were synthesized and isolated. The relevant degradation mechanisms are discussed in detail. KW - Musk KW - AHTN KW - HHCB KW - HHCB-lactone KW - Chlorination KW - Disinfection PY - 2011 DO - https://doi.org/10.1007/s00216-011-4674-3 SN - 1618-2642 SN - 1618-2650 VL - 399 IS - 10 SP - 3579 EP - 3588 PB - Springer CY - Berlin AN - OPUS4-23622 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Determination and Quantification of LAS-isomers using GC-MS and GC-FID T2 - EMEC 9 CY - Girona, Spain DA - 2008-12-03 PY - 2008 AN - OPUS4-18394 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Grimm, T. A1 - Kleine-Benne, E. A1 - Senz, R. A1 - Piechotta, Christian T1 - Stoffwechselprozesse analysieren und überwachen KW - SPME KW - GC KW - Stoffwechselprodukte PY - 2008 SN - 0344-1733 SN - 1610-8256 IS - 10 SP - 46 EP - 49 PB - Vogel CY - Würzburg AN - OPUS4-18431 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Garbe, L.A. A1 - Würtz, A. A1 - Piechotta, Christian A1 - Tressl, R. T1 - The Peptide-catalyzed Maillard Reaction - Characterization of 13C Reductones N2 - The reaction pathways of amino acids and reducing sugars are now fully understood. The focus in the last few years, however, has turned to the reaction of peptides and proteins with reducing sugars. We have investigated the reaction of γ-aminobutanoic acid, the heptapeptide Nα-Acetyl-Lys-Lys-β-Ala-Lys-β-Ala-Lys-Gly, and the model protein β-casein in Maillard reactions with 1-13C arabinose. Characterization of 13C-labeled acetic acid and norfuraneol by gas chromatography–mass spectrometry and nuclear magnetic resonance revealed new formation pathways. The results demonstrate significant differences in the labeling pattern of the products depending on the amine used, indicating different formation pathways of acetic acid and norfuraneol. KW - Norfuraneol KW - 13C labeling KW - Pathway KW - Casein KW - Peptide PY - 2008 DO - https://doi.org/10.1196/annals.1433.046 SN - 0077-8923 SN - 1749-6632 SN - 0094-8500 VL - 1126 SP - 244 EP - 247 PB - New York Academy of Sciences CY - New York, NY AN - OPUS4-18432 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Screening von aeroben mikrobiellen Konversionsvorgängen in Biotransformationen, Abbau- und Stoffwechselprozessen mit direkter GC-SPME-Analytik T2 - ANAKON 2009 CY - Berlin, Germany DA - 2009-03-17 PY - 2009 AN - OPUS4-20775 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Bestimmung von CAS in Klärschlämmen T2 - Jahrestagung 2006 der GDCh, Fachgruppe "Umweltchemie und Ökotoxikologie", Martin-Luther-Universität Halle-Wittenberg CY - Halle (Saale), Germany DA - 2006-10-04 PY - 2006 AN - OPUS4-12428 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Methylquecksilber-Bestimmung in Fischmatrizes mittels massenspektrometrischer Methoden T2 - 12. Varian-MS-Anwendertreffen, Akademie Schloss Hohenkammer CY - Hohenkammer, Germany DA - 2007-01-16 PY - 2007 AN - OPUS4-14306 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Arsen- und Quecksilberspezies in Fisch T2 - 4. Conference über Ionenanalyse, Technische Universität Berlin CY - Berlin, Germany DA - 2007-03-12 PY - 2007 AN - OPUS4-14307 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Entwicklung eines LAS-Kalibrierstandards T2 - 4. Conference über Ionenanalyse CY - Berlin, Germany DA - 2007-03-12 PY - 2007 AN - OPUS4-14308 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Bestimmung toxikologisch relevanter Schwermetall-Spezies in Fisch T2 - 36. Deutscher Lebensmittelchemikertag 2007 CY - Nuremberg, Germany DA - 2007-09-10 PY - 2007 AN - OPUS4-14605 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Synthetic linear alkylbenzenesulfonates (LAS) as calibration standard T2 - EUROanalysis XIV CY - Antwerp, Belgium DA - 2007-09-09 PY - 2007 AN - OPUS4-14772 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Development and validation of a method for the quantification of tributyltin at subnanogram per liter concentrations T2 - TraceSpec 2007 CY - Münster, Germany DA - 2007-09-04 PY - 2007 AN - OPUS4-14816 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Lineare Alkylbenzolsulfonate (LAS) - Die Entwicklung eines Kalibrierstandards T2 - Jahrestagung 2007, Umweltchemie und Ökotoxikologie, Von der Chemodynamik in Ökosystemen zur Stoffbewertung CY - Osnabrück, Germany DA - 2007-09-26 PY - 2007 AN - OPUS4-14817 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schmidt, Sebastian A1 - Piechotta, Christian A1 - Godejohann, M. A1 - Win, Tin A1 - Nehls, Irene A1 - Mügge, C. T1 - Characterisation of commercially available linear alkylbenzenesulfonates by LC-SPE-NMR/MS (liquid chromatography-solid phase extraction-nuclear magnetic resonance spectroscopy-mass spectroscopy) N2 - Commercially available linear alkylbenzenesulfonates (LASs) are a mixture of various homologues and isomers, leading to 20 major species. In this work we investigated the commercial product by liquid chromatography-solid phase extraction-nuclear magnetic resonance spectroscopy-mass spectrometry (LC-SPE-NMR/MS). The commercial product was separated into 17 fractions by liquid chromatography (LC). After chromatographic separation, 5% of the flow was split to a mass spectrometer (MS) while 95% was send to post-column solid phase extraction cartridges for enrichment of the analytes (LC-SPE). After elution from the SPE-cartridges a NMR-spectrometer equipped with a cryo-probe was used for the characterisation of the different LASs species. For the first time H-1-1D and H-H-COSY spectra for 14 LASs species out of 20 major isomers are presented, whereas the 6 remaining species are detected as mixtures in 3 H-1-1D and H-H-COSY spectra. These data were used to correlate the chromatographic retention of the LASs isomers to the substitution pattern of the alkyl chain. KW - Linear alkylbenzenesulfonates KW - NMR KW - SPE KW - Liquid chromatography KW - Mass spectrometry KW - Surfactants PY - 2010 DO - https://doi.org/10.1016/j.talanta.2010.04.011 SN - 0039-9140 VL - 82 IS - 1 SP - 143 EP - 150 PB - Elsevier CY - Amsterdam AN - OPUS4-24004 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Faust, R. A1 - Nauroozi, D. A1 - Bruhn, C. A1 - Koch, B. A1 - Kuhlich, Paul A1 - Piechotta, Christian A1 - Nehls, Irene T1 - (3,5,5,6,8,8-Hexamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)methanol: a possible metabolite of the synthetic musk fragrance AHTN N2 - The title compound (AHTN-OH), C17H26O, was prepared in order to provide standard materials for the qualitative and quantitative analysis of environmental pollutants. The molecule possesses a chiral C atom, although the structure determination was performed on racemic material, expressed in the structure as disordered chiral sites. The asymmetric unit consists of four AHTN-OH molecules containing an hydroxy group and forming a tetrameric cyclic motif built up by four strong hydrogen bonds between these hydroxy groups and additionally by two weak C–H···π interactions. Furthermore, these tetramers are linked via very weak C–H···π interactions, forming chains along the c axis. PY - 2011 DO - https://doi.org/10.1107/S1600536811018009 SN - 1600-5368 VL - 67 SP - o1462-o1463, sup1-15 PB - Munksgaard CY - Copenhagen AN - OPUS4-24310 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - A New Approach for the Characterization of Commercial Linear Alkylbenzene Sulfonate (LAS) T2 - 5. Conference über Ionenanalyse (CIA) CY - Berlin, Germany DA - 2011-09-26 PY - 2011 AN - OPUS4-24371 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lischka, Susanne A1 - Körte, F. A1 - Faust, R. A1 - Nehls, Irene A1 - Piechotta, Christian T1 - Synthesis, characterization and application of a two-fold 13C-labeled calibration standard for the analysis of arsenobetaine using HPLC-ESI-MS/MS without high resolution mass spectrometry N2 - A procedure has been developed for the determination of arsenobetaine in fish matrix by HPLC–ESI-MS/MS. Hereby (trimethylarsonium)-1,2-13C-acetate (arsenobetaine) is used as internal calibration standard. Arsenobetaine was determined in a fish material (Sea Bass) with an expanded uncertainty of 3.8%. KW - Arsenobetaine KW - ESI-MS/MS KW - Isotopic labeled KW - 13C PY - 2011 DO - https://doi.org/10.1016/j.talanta.2011.07.047 SN - 0039-9140 VL - 85 IS - 4 SP - 1996 EP - 1999 PB - Elsevier CY - Amsterdam AN - OPUS4-25163 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Simone A1 - Deubel, Jan A1 - Raspe, Tina A1 - Fettig, Ina A1 - Piechotta, Christian T1 - Chemische Brandspurenanalytik T2 - Vfdb 2012 -Jahresfachtagung CY - Köln, Deutschland DA - 2012-05-21 KW - Brandbeschleuniger KW - Brandgase KW - Brand KW - Partikel KW - Analytik PY - 2012 SP - 517 EP - 539 PB - VdS Schadenverhütung CY - Köln AN - OPUS4-25933 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Analyse von perfluorierten Chemikalien - LC-MS vs. GC-MS T2 - LC-MS in der Umweltanalytik 2012 CY - Leipzig, Germany DA - 2012-06-11 PY - 2012 AN - OPUS4-26048 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Simone A1 - Deubel, Jan A1 - Werrel, Martin A1 - Fettig, Ina A1 - Raspe, Tina A1 - Piechotta, Christian T1 - Experimental studies on the effect of fire accelerant during living room fires N2 - The influence of fire accelerants on the fire behavior during living room fires was experimentally investigated by performing 5 different room fire scenarios. During the tests flre-technological quantities were determined as well as chemical-analytical studies were carried out. The focus was on the detection of smoke gases and the proof of used fire accelerants. The evaluation of traceable fire accelerants and the reconstruction of the fire development are based on a precise Chemical analysis of the combustion products. In this work an innovative methodology was developed to combine available analyticai techniques to draw conclusions from solid, liquid and gaseous fire residues about the fire process. Each ofthe fire rooms was equipped with the same living room inventory. The location and amount of fire accelerant (a mixture of diesel/gasoline) differed in 4 of 5 tests. Orte room fire experiment was carried out without fire accelerant. The following fire technological characteristics were determined during the room fire experiments: mass loss (of the complete room), temperatures (at several locations in the room), heat release and smoke gas emission (measured at three different locations: in the chimney, in the fire room and at the door opening). While the smoke gases were analysed by using Fourier Transform Infrared spectroscopy, the fire residues and swipe samples (particles) were examined by Headspace-Solid Phase Microextraction- Gaschromatography-Mass spectrometry. These procedures make it possible to detect low concentrations of volatile components of the fire accelerants. The Chemical analyticai results of the fire accelerant detection are presented. T2 - Fire and materials 2013 - 13th International conference and exhibition CY - San Francisco, CA, USA DA - 28.01.2013 KW - Accelerant KW - Chemical analysis KW - Toxicity PY - 2013 SP - 729 EP - 743 PB - Interscience Communications CY - London, UK AN - OPUS4-27708 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Richter, Janine A1 - Fettig, Ina A1 - Piechotta, Christian A1 - Philipp, Rosemarie A1 - Jakubowski, Norbert T1 - Tributylzinn in Gesamtwasserproben - Entwicklung eines Referenzverfahrens für die EU-Wasserrahmenrichtlinie PY - 2013 SN - 0016-3538 IS - 9 SP - 2 EP - 4 PB - GIT-Verlag CY - Darmstadt AN - OPUS4-29040 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Arroyo-Abad, Uriel A1 - Lischka, Susanne A1 - Piechotta, Christian A1 - Mattusch, J. A1 - Reemtsma, T. T1 - Determination and identification of hydrophilic and hydrophobic arsenic species in methanol extract of fresh cod liver by RP-HPLC with simultaneous ICP-MS and ESI-Q-TOF-MS detection N2 - The present study was focused on the determination and identification of arsenic species in methanolic extracts of cod liver. Arsenic species were fractionated and the fractions analysed by RP-HPLC-ICP-MS coupled with ESI-Q-TOF-MS. The total concentration of arsenic in the fresh cod liver was analysed by ICP-MS to be 1.53 ± 0.02 mg As kg-1 w.w. and the extraction recovery was ca. 100% and the column recovery >93%. Besides polar inorganic and methylated arsenic species (>70%) more hydrophobic arsenic-containing fatty acids and hydrocarbons occurred. Based on the mass spectrometric data proposals for molecular structures were elaborated for 20 of the organic As species included 10 arsenic-containing fatty acids (AsFA) and an arsenic-containing hydrocarbon (AsHC) mentioned for the first time in fresh cod liver. Arsenobetaine was found as main water-soluble arsenic compound in cod liver followed by higher molecular mass arsenic-containing fatty acids and hydrocarbons. KW - Arsenic species KW - Arsenolipids KW - Marine fish KW - Cod liver KW - HPLC-ICP-MS/ESI-Q-TOF-MS PY - 2013 DO - https://doi.org/10.1016/j.foodchem.2013.05.152 SN - 0308-8146 VL - 141 IS - 3 SP - 3093 EP - 3102 PB - Elsevier CY - Amsterdam [u.a.] ; Jena AN - OPUS4-28852 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Identifizierung und analytische Betrachtung von Arsenolipiden in Hering T2 - ANAKON 2013 CY - Essen, Germany DA - 2013-03-04 PY - 2013 AN - OPUS4-27780 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Einsatz eines isotopenmarkierten Kalibrierstandards zur Bestimmung von Arsenobetain mittels HPLC-ESI-MS/MS T2 - CANAS 2013 CY - Freiberg, Germany DA - 2013-03-18 PY - 2013 AN - OPUS4-27781 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lischka, Susanne A1 - Arroyo-Abad, Uriel A1 - Mattusch, J. A1 - Kühn, Andreas A1 - Piechotta, Christian T1 - The high diversity of arsenolipids in herring fillet (Clupea harengus) N2 - Arsenolipids represent a relevant step in the biosynthesis of organoarsenicals from inorganic arsenic compounds. Their fate after human consumption is still uncertain. By means of a HPLC-ICP-MS/ESI-Q-TOF-MS method, 16 lipid soluble arsenic compounds, including seven formerly unknown organoarsenicals, have been identified in commercial herring fillet. The structural assignment was done by exact mass and high resolution MS/MS data. This is the first identification of arsenolipids in herring (Clupea harengus). They contribute with (3.6±0.2) mg kg-1 arsenic to 62.3% of the total arsenic content of (5.7±0.3) mg of arsenic per kg dry mass. Current studies indicate that a metabolization by humans to cancerous dimethylarsinic acid is very likely. The presented results are highly relevant as herring is a very popular food fish species in Europe. Moreover, the screening of different fish species revealed that arsenolipids are more widespread than previously assumed. KW - Arsenic species KW - Arsenolipids KW - Fish KW - Herring KW - ESI-MS/MS KW - ICP-TOF-MS PY - 2013 DO - https://doi.org/10.1016/j.talanta.2013.02.051 SN - 0039-9140 VL - 110 SP - 144 EP - 152 PB - Elsevier CY - Amsterdam AN - OPUS4-28302 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Piechotta, Christian T1 - Identification and Characterization of New Disinfections By-products of Polycyclic Musks (AHTN and HHCB) in Swimming pool water T2 - ICCE 2013 CY - Barcelona, Spain DA - 2013-06-24 PY - 2013 AN - OPUS4-28773 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -