TY - CONF A1 - Pritzkow, Wolfgang T1 - Neue, verbesserte und SI-rückgeführte Atomgewichtsbestimmung von Cd mit MC-TIMS und MC-IPC-MS T2 - 6. Symposium Massenspektrometrische Verfahren der Elementspurenanalyse / 18. ICP-MS Anwendertreffen CY - Berlin, Germany DA - 2003-10-06 PY - 2003 AN - OPUS4-4930 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pritzkow, Wolfgang T1 - Measurement of Isotopic Composition of Elements (MICE) - a new interlaboratory comparison T2 - 6. Symposium Massenspektrometrische Verfahren der Elementspurenanalyse / 18. ICP-MS Anwendertreffen CY - Berlin, Germany DA - 2003-10-06 PY - 2003 AN - OPUS4-4932 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pritzkow, Wolfgang T1 - Messtechnik T2 - 1. Workshop "Isotopenverdünnungsanalyse mit ICP-MS" CY - Berlin, Germany DA - 2002-11-11 PY - 2002 AN - OPUS4-2989 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pritzkow, Wolfgang T1 - A comparative study in the field of soil analysis T2 - 2. Symposium " Trends in sample preparation" CY - Seggauberg, Austria DA - 2004-07-04 PY - 2004 AN - OPUS4-5054 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gloede, J. A1 - Ozegowski, S. A1 - Keitel, I. A1 - Buttge, K. A1 - Gruner, M. A1 - Costisella, B. A1 - Pritzkow, Wolfgang A1 - Stephan, H. A1 - Bartoschek, M. T1 - Zweifach und dreifach intramolekular verbrückte p-tert-Butylcalix[8]aren-triphosphate - Synthese, Struktur und Stereochemie [1] N2 - The phosphorylation of p-tert-butylcalix[8]arene (1) with phosphorus pentachloride and hydrolysis gives intramolecular bridging tert-butylcalix[8]arene triphosphates. The reactivity (esterification, dehydratisation, complexation), the structure (nmr and x-ray), and the stereochemical behaviour of the phosphates will be discussed. KW - Calix[8]arenes KW - Phosphates KW - Heterocycles KW - Stereochemistry PY - 2006 DO - https://doi.org/10.1002/zaac.200500203 SN - 0044-2313 SN - 1521-3749 SN - 0372-7874 SN - 0863-1786 SN - 0863-1778 VL - 632 IS - 1 SP - 123 EP - 132 PB - Wiley-VCH CY - Weinheim AN - OPUS4-13201 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Riebe, Gundel A1 - Pritzkow, Wolfgang A1 - Vogl, Jochen T1 - Schwermetallbestimmung im Boden KW - Königswasserextraktion KW - Bodenanalyse KW - Schwermetallbestimmung KW - Unsicherheitsvergleiche PY - 2006 SN - 0016-3538 IS - 8 SP - 688 EP - 690 PB - GIT-Verlag CY - Darmstadt AN - OPUS4-13725 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pritzkow, Wolfgang A1 - Wunderli, S. A1 - Vogl, Jochen A1 - Fortunato, G. T1 - The isotope abundances and the atomic weight of cadmium by a metrological approach N2 - Gravimetric synthetic mixtures of seven enriched, purified cadmium isotope materials were used to determine the correction factors for mass fractionation (MC-TIMS) and mass discrimination (MC-ICP-MS). The isotope abundance ratios determined for various natural cadmium materials represents the isotope composition for natural cadmium materials. Correction of the isotope abundance ratios observed yielded isotope abundances of 106Cd 0.012450(8), 108Cd 0.008884(4), 110Cd 0.124846(16), 111Cd 0.127955(14), 112Cd 0.241110(38), 113Cd 0.122254(22), 114Cd 0.287439(60) and 116Cd 0.075183(32). The newly determined atomic weight of natural cadmium based on SI-traceable evaluation of the isotope abundance ratios is 112.41384(18). The cadmium material designated in the paper as Cd-2211 can be used as an isotope reference material with a δ(114Cd/110Cd)-value of 0‰. The results obtained show that the uncertainties for the isotope abundances and the atomic weight given as IUPAC values for cadmium are overestimated. KW - Atomic weight KW - Isotope abundance KW - Isotopic composition KW - Cadmium PY - 2007 SN - 0168-1176 SN - 0020-7381 SN - 1387-3806 SN - 1873-2798 VL - 261 IS - 1 SP - 74 EP - 85 PB - Elsevier CY - Amsterdam AN - OPUS4-14543 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Linsinger, T. A1 - Andrzejuk, W. A1 - Bau, A. A1 - Charoud-Got, J. A1 - De VOs, P. A1 - Emteborg, H. A1 - Hearn, R. A1 - Lamberty, A. A1 - Oostra, A. A1 - Pritzkow, Wolfgang A1 - Quétel, C. A1 - Roebben, G. A1 - Tresl, I. A1 - Vogl, Jochen A1 - Wood, S. T1 - Production of three certified reference materials for the sulfur content in gasoline (petrol) N2 - Directive 2003/17/EC of the European Parliament and the European Council stipulates that petrol (gasoline) with a total sulfur content below 10 mg kg-1 must be available in all European Union member states by 2009. Three certified reference materials were produced in support of this directive in a joint effort of the members of the European Reference Materials Initiative (ERM). Two of the materials were made from commercial petrol, while the third one was prepared from a blend of commercial petrols. Relative between-ampule heterogeneity of the materials was quantified and found to be below 2.5%. Potential degradation during storage and dispatch was quantified, and shelf lives based on these values were set. The three materials were characterized by three institutes using different variants of isotope-dilution mass spectrometry. The results from the three institutes were combined, and the final uncertainties of the respective sulfur mass fractions were estimated including contributions from heterogeneity, stability, and characterization. The following mass fractions were derived: ERM-EF211, 48.8 ± 1.7 mg kg-1; ERM-EF212, 20.2 ± 1.1 mg kg-1; and ERM-EF213, 9.1 ± 0.8 mg kg-1. KW - CRM KW - IDMS KW - ERM PY - 2007 DO - https://doi.org/10.1021/ef070155t SN - 0887-0624 SN - 1520-5029 VL - 21 IS - 4 SP - 2240 EP - 2244 PB - ACS Publ. CY - Washington, DC AN - OPUS4-16371 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weißhaupt, Petra A1 - Naumann, Annette A1 - Pritzkow, Wolfgang A1 - Noll, Matthias T1 - Nitrogen uptake of hypholoma fasciculare and coexisting bacteria N2 - The white-rot fungus Hypholoma fasciculare coexists with a bacterial community that uses low-molecular weight carbon sources provided by fungal, extracellular enzyme activities. Since fungal development on wood is limited by the availability of nitrogen (N), bacteria could contribute to the N supply. To prove or disapprove an interaction in terms of N transfer, N sources of the fungus and the coexisting bacterial isolates were investigated, and the bacterial N2 fixation was quantified. Fungal, fungal—bacterial and bacterial wood decomposition was analysed by Fourier transform infrared spectroscopy (FTIR), mass loss and surface pH. Microbial N preferences were investigated by elemental analysis isotope ratio mass spectrometry (IRMS). In addition, diazotrophic activity was explored after cultivation under a 15N2/O2 atmosphere. Decomposition was similar with and without bacteria and both H. fasciculare and coexisting bacteria preferred reduced N species, such as urea, ammonium and organic N. In most of the bacteria, the 15N abundance in the biomass increased significantly but to a low extent if they were cultivated under a 15N2/O2 atmosphere. This effect is considered an artefact and attributed to adsorption rather than to bacterial N2 fixation activity. Hence, the bacteria coexisting with H. fasciculare rather competed for the same N sources than supported fungal N supply by diazotrophic activity. KW - Hypholoma fasciculare KW - Proteobacteria KW - Fungal-bacterial interaction KW - 15N2 fixation KW - FTIR-ATR spectroscopy KW - IRMS PY - 2013 DO - https://doi.org/10.1007/s11557-012-0834-x SN - 1617-416X SN - 1861-8952 VL - 12 IS - 2 SP - 283 EP - 290 PB - Springer CY - Heidelberg AN - OPUS4-28867 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schmalenberger, A. A1 - Pritzkow, Wolfgang A1 - Ojeda, J.J. A1 - Noll, Matthias T1 - Characterization of main sulfur source of wood-degrading basidiomycetes by S K-edge X-ray absorption near edge spectroscopy (XANES) N2 - The main wood degraders in aerobic terrestrial ecosystems belong to the white- and brown-rot fungi, where their biomass can be created on wood decay only. However, total sulfur (S) concentration in wood is very low and only little is known about the different sulfur compounds in wood today. Sulfur-starved brown-rot fungi Gloeophyllum trabeum and Oligoporus placenta were incubated on sterilized pine wood blocks whereas Lentinus cyathiformis and the white-rot fungi Trametes versicolor were incubated on sterilized beech wood blocks. After 19 weeks of incubation, the S oxidation status was analyzed in wood, in degraded wood, and in biomass of wood-degrading fungi by synchrotron based S K-edge XANES, and total S and sulfate were quantified. Total sulfur and sulfate content in pine wood blocks were approximately 50 and 1 µg g-1, respectively, while in beech wood approximately 100 and 20 µg g-1 were found, respectively. Sulfur in beech was dominated by sulfate-esters. In contrast, pine wood also contained larger amounts of reduced S. Three out of four selected fungi caused a reduction of the S oxidation state in wood from oxidized S (sulfate-ester, sulfate) to intermediate S (sulfonate, sulfoxide) or reduced S (thiols, e.g., proteins, peptides, enzyme cofactors). Only O. placenta shifted thiol to sulfonate. Growth experiments of these fungi on selective minimal media showed that in particular cysteine (thiol), sulfonates, and sulfate enhanced total mycelium growth. Consequently, wood-degrading fungi were able to utilize a large variety of different wood S sources for growth but preferentially transformed in vivo sulfate-esters and thiol into biomass structures. KW - Basidiomycetes KW - Fungi KW - S K-edge X-ray absorption near edge spectroscopy (XANES) KW - Sulfur oxidation status KW - Sulfate-esters PY - 2011 DO - https://doi.org/10.1016/j.ibiod.2011.08.013 SN - 0964-8305 VL - 65 IS - 8 SP - 1215 EP - 1223 PB - Elsevier CY - Barking AN - OPUS4-27546 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vogl, Jochen A1 - Rosner, Martin A1 - Pritzkow, Wolfgang T1 - The need for new isotope reference materials N2 - Isotope reference materials are needed to calibrate and validate analytical procedures used for the determination of isotope amount ratios, procedurally defined isotope ratios or so-called δ values. In contrast to the huge analytical progress in isotope ratio analytics, the production of isotope reference materials has not kept pace with the increasing needs of isotope analysts. Three representative isotope systems are used to explain the technical and non-technical difficulties and drawbacks, on one hand, and to demonstrate what can be achieved at its best, on the other hand. A clear statement is given that new isotope reference materials are needed to obtain traceable and thus comparable data, which is essential for all kinds of isotope research. The range of available isotope reference materials and δ reference materials should be increased and matrix reference materials certified for isotope compositions or δ values, which do not exist yet, should be provided. KW - Isotope reference materials KW - Delta reference materials KW - Synthetic isotope mixtures KW - Mass spectrometry KW - Comparability KW - Traceability KW - Measurement uncertainty PY - 2013 DO - https://doi.org/10.1007/s00216-012-6605-3 SN - 1618-2642 SN - 1618-2650 VL - 405 IS - 9 SP - 2763 EP - 2770 PB - Springer CY - Berlin AN - OPUS4-28169 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -