TY - CONF A1 - Riedel, Juliane A1 - Köppen, Robert A1 - Proske, Matthias A1 - Koch, Matthias T1 - cis-trans isomerism of zearalenone T2 - 34. Mycotoxin-Workshop CY - Braunschweig, Germany DA - 2012-05-14 PY - 2012 AN - OPUS4-25889 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Neuhaus, B. A1 - Allspach, A. A1 - Bartsch, P. A1 - Burckhardt, D. A1 - Coleman, C.O. A1 - Fries, I. A1 - Fuchs, R. A1 - Gudo, M. A1 - Kotrba, M. A1 - Mentjes, M. A1 - Moore, S. A1 - Neumann, D. A1 - Oberer, C. A1 - Potthast, A. A1 - Riedel, Juliane A1 - Rudolf, R. A1 - Schnalke, T. A1 - Schönbohm, D. A1 - Schuda, M. A1 - van Dam, A. A1 - Widulin, N. T1 - KUR-Projekt: Aufbau und öffentliche Kommunikation eines wissenschafts-basierten Sammlungsmanagements für naturkundliche Nasssammlungen N2 - Im Rahmen eines von der Kulturstiftung des Bundes und der Kulturstiftung der Länder geförderten Projektes zum Erhalt naturkundlicher Nasssammlungen wurden 1) der Zustand der Sammlungen bewertet (Profiling; Analyse der Vergällungsmittel), 2) über Workshops Expertenwissen in das Projekt gebracht, 3) neue archivbeständige Materialien und Managementmaßnahmen eingeführt (Borosilikat-Gläser und - Röhrchen, Augenwatte, Tefloneinlagen, Japanpapier, archivbeständige Kleber und Papier, Etikettenaufbewahrung; digitales Dichtemessgerät, Alcomon-Indikator, Kontrollintervalle), 4) Erhaltungsmaßnahmen zur langfristigen Konservierung in großem Umfange durchgeführt (Messen der Alkoholkonzentration, Umsetzen von Präparaten in geeignetere Gefäße, Wiederverschluss von Schaugläsern) und 5) Erfahrungen und Diskussionsergebnisse zusammengestellt, nicht ohne auf Wissenslücken und wünschenswerte Forschungsaspekte hinzuweisen. Das Projekt profitierte besonders von der Expertise aus den Materialwissenschaften und der Papierrestaurierung. Das Museum für Naturkunde Berlin kooperierte eng mit dem Berliner Medizinhistorischen Museum der Charité, der Zoologischen Staatssammlung München und dem Forschungsinstitut Senckenberg in Frankfurt. Letzteres Museum führte ein eigenes, themenverwandtes KUR-Projekt Restauration der Sammlungen 'Vergleichende Anatomie, Embryologie und Histologie' des Naturmuseums Senckenberg durch. KW - Nasssammlung KW - Ethanol KW - Vergällungsmittel PY - 2012 U6 - https://doi.org/10.5165/hawk-hhg/epublication/44 SP - 1 EP - 32 AN - OPUS4-25491 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Brezina, U. A1 - Kersten, S. A1 - Valenta, H. A1 - Sperfeld, P. A1 - Riedel, Juliane A1 - Dänicke, S. T1 - UV-induced cis-trans isomerization of zearalenone in contaminated maize N2 - In the literature, it has been shown that the naturally occurring trans-zearalenone (ZEN) is transformed by ultraviolet irradiation to cis-ZEN. However, the practical relevance of this transformation in animal feeding remains unclear. The aim of the present preliminary investigation was to examine the effect of UV-irradiation on the concentration of trans-ZEN in a natural feed matrix at different dry matter contents to simulate the dry and wet feeding techniques usually applied in pig feeding. Four variants, air dry or wet ZEN-contaminated ground maize either irradiated or not were tested and analysed with conventional HPLC-FLD for trans-ZEN changes, which were further examined for cis-ZEN formation by HPLC-MS/MS. In conclusion, it could be shown that, under the investigated wet feed conditions, naturally occurring trans-ZEN was partially converted by ultraviolet irradiation to its cis counterpart. In contrast, the cis/trans isomerization seemed not to be relevant in dry maize. The consequence of this finding for practical liquid feeding systems for pigs requires further investigation. Additionally, an improvement of the analytical method for cis-ZEN determination is needed. KW - Cis-/trans-zearalenone KW - Ultraviolet irradiation KW - Maize KW - HPLC PY - 2013 U6 - https://doi.org/10.1007/s12550-013-0178-7 SN - 0178-7888 VL - 29 IS - 4 SP - 221 EP - 227 PB - Springer CY - Berlin; Heidelberg AN - OPUS4-29443 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Riedel, Juliane A1 - Koch, Matthias A1 - Fettig, Ina A1 - Labsch, Erika A1 - Piechotta, Christian A1 - Köppen, Robert A1 - Nehls, Irene T1 - Vergällungsmittel in Ethanol T2 - Workshop "Etiketten in Nasssammlungen: Probleme und Lösungsansätze" (Museum für Naturkunde, Berlin) CY - Berlin, Germany DA - 2011-01-28 PY - 2011 AN - OPUS4-22999 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Sommerfeld, Thomas A1 - Koch, Matthias A1 - Mauch, Tatjana A1 - Jung, Christian A1 - Riedel, Juliane A1 - Lisec, Jan T1 - CRM BAM-A001 eCerto data file N2 - Data file (RData) containing measurement data recorded during the production process of the Certified Reference Material BAM-A001 containing Polycyclic Aromatic Hydrocarbons (PAH) in olive oil. The data can be most conveniently openend using the Shiny-App eCerto which is accessible at https://www.bam.de/eCerto. KW - Certified reference material KW - Mass spectrometry KW - Olive oil KW - Aromatic hydrocarbons KW - Reference data PY - 2023 UR - https://doi.org/10.5281/zenodo.8380870 U6 - https://doi.org/10.5281/zenodo.8380869 PB - Zenodo CY - Geneva AN - OPUS4-58488 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Li, X.Q. A1 - Li, H.M. A1 - Jiao, H. A1 - Guo, Z.H. A1 - Zhang, Q.H. A1 - Kneeteman, L.E. A1 - Lewin, M. A1 - Pires do Rego, E.C. A1 - Leal, R.V. A1 - Violante, F.G.M. A1 - Riedel, Juliane A1 - Koch, Matthias T1 - CCQM Key Comparison track A CCQM-K168: Non-polar analytes in high carbohydrate food matrix: trans-zearalenone in maize powder N2 - Demonstrating competency and equivalence for the measurement capacity of contaminants and nutrients in primary foodstuffs is a priority of the OAWG 10-year strategy for Track A core comparisons. Such measurements have posed significant challenges for reference material producers and calibration service providers. This key comparison (KC), under the topic of “non- polar analyte in high carbohydrate food matrix: trans-Zearalenone (trans-ZEN) in maize powder” , was a sector of the model system selected to align with this class within the OAWG strategy. Evidence of successful participation in formal, relevant international comparisons is needed to demonstrate the Calibration and Measurement Capabilities (CMCs) of national metrology institutes (NMIs) and designated institutes (DIs). 17 NMIs and DIs participated in the Track A KC CCQM- 168 “non-polar analyte in high carbohydrate food matrix: trans-ZEN in maize powder” . Participants were requested to evaluate the mass fraction (μg/kg) of trans-ZEN in maize powder material. Methods like liquid-liquid extraction and SPE were applied in the pre-treatment, and HPLC-MS/MS and HPLC-FLD were used for detection by the participants. The mass fractions for trans-ZEN were in the range of (91.8 to 169) μg/kg with standard uncertainties of (1.5 to 24.7) μg/kg, and corresponding relative standard uncertainties from 1.5% to 14.6%. Two labs, INTI and BAM were excluded from the KCRV evaluation. INTI result was identified as an outlier and confirmed their method had insufficient specificity. For BAM the calibration approach they used does not meet the CIPM traceability requirements. The other 15 labs included in the calculation of the consensus KCRV all agreed within their standard uncertainties. Hierarchical Bayes was used as estimators in calculating KCRV and standard uncertainty. Successful participation in CCQM-K168 demonstrates the measurement capabilities in determining mass fraction of organic compounds, with molecular mass of 100 g/mol to 500 g/mol, having low polarity pKow < -2, in mass fraction range from 1 μg/kg to 1000 μg/kg in a high carbohydrate food matrix. KW - Metrology KW - Quality Assurance KW - Mycotoxin Analysis KW - Sustainable Food Safety PY - 2023 U6 - https://doi.org/10.1088/0026-1394/60/1A/08021 VL - 60 IS - 1a SP - 08021 AN - OPUS4-59059 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -