TY - JOUR A1 - Wunderli, S. A1 - Fortunato, G. A1 - Vogl, Jochen A1 - Pritzkow, Wolfgang T1 - Meterology of determination for a new cadmium atomic weight and metrological application to cadmium in rice using MC-ICP-MS KW - Atomic weight KW - Isotope KW - MC-ICP-MS KW - Cadmium KW - Determination of metrology of new cadmium atomic weight KW - Mass spectrometry KW - Review KW - Multicollector inductively coupled plasma mass spectrometry PY - 2003 SN - 1004-2997 VL - 24 IS - 4 SP - 467 EP - 470 CY - Beijing AN - OPUS4-31076 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vogl, Jochen A1 - Pritzkow, Wolfgang T1 - Isotope reference materials for present and future isotope research N2 - The variation of isotope abundance ratios is increasingly used to unravell natural and technical questions. In the past the investigation and interpretation of such variations was the field of a limited number of experts. With new upcoming techniques and research topics in the last decades, such as provenance and authenticity of food, the number of published isotope data strongly increased. The development of inductively coupled plasma mass spectrometers (ICPMS) from an instrument for simple quantitative analysis to highly sophisticated isotope abundance ratio machines influenced this process significantly. While in former times only experts in mass spectrometry were able to produce reproducible isotope data, nowadays many laboratories, never been in touch with mass spectrometry before, produce isotope data with an ICPMS. Especially for such user isotope reference materials (IRM) are indispensible to enable a reliable method validation. The fast development and the broad availability of ICPMS also lead to an expansion of the classical research areas and new elements are under investigation. Here all users require IRM to correct for mass fractionation or mass discrimination or at least to enable isotope data related to a common accepted basis. Despite this growing interest suitable IRM are still lacking for a number of isotope systems such as magnesium. PY - 2011 SN - 1471-8022 VL - 75 IS - 3 SP - 2098 PB - Mineralogical Society of Great Britain and Ireland CY - London AN - OPUS4-32683 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pritzkow, Wolfgang T1 - Sr-Isotopenreferenzmaterial - Ist eine neue Zertifizierung erforderlich? T2 - 21. ICP-MS-Anwendertreffen + 8. Symposium der Massenspektrometische Verfahren der Elementaranalyse CY - Dresden, Germany DA - 2008-09-17 PY - 2008 AN - OPUS4-18056 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vogl, Jochen A1 - Pritzkow, Wolfgang T1 - Isotope reference materials for present and future isotope research N2 - Isotope reference materials are essential to enable reliable and comparable isotope data. This article reviews the work in this field within the past years. The focus is on all stable elements, except for classical stable isotopes (H, C, N, O, S) and for radioactive elements. Currently available isotope reference materials are listed. The limitations of synthetic isotope mixtures being used to characterize these materials are discussed, as well as the limitations of the isotope reference materials, such as uncertainty and homogeneity. The needs for present research on isotope variations are being considered and are compared to the limitations of current isotope reference materials. This disagreement between both can only be solved by providing isotope reference materials defining a δ-scale for each element of interest. Such materials should be provided with additional data on isotope abundances whenever possible. As an outlook a possible outline for a new program on isotope reference materials is discussed. KW - IRM KW - Isotope reference materials KW - Delta-RM KW - ICPMS KW - TIMS KW - Synthetic mixtures PY - 2010 DO - https://doi.org/10.1039/c000509f SN - 0267-9477 SN - 1364-5544 VL - 25 SP - 923 EP - 932 PB - Royal Society of Chemistry CY - London AN - OPUS4-21841 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rosner, Martin A1 - Pritzkow, Wolfgang A1 - Vogl, Jochen A1 - Voerkelius, S. T1 - Boron isotope compositions of crop plants: A new tracer for the origin and authenticity of food T2 - TRACE 5th Annual Meeting and Conference CY - Freising, Germany DA - 2009-04-01 KW - Boron isotopes in food KW - Provenance studies KW - Reference materials KW - Analytical uncertainty PY - 2009 IS - Session A / Part I SP - 1 EP - 2 AN - OPUS4-20293 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vogl, Jochen A1 - Pritzkow, Wolfgang T1 - Isotope dilution mass spectrometry - a primary method of measurement and its role for RM certification KW - IDMS KW - Reference materials KW - Metrology KW - ICPMS KW - TIMS PY - 2010 SN - 0970-3950 VL - 25 IS - 3 SP - 135 EP - 164 PB - Metrology Society of India CY - New Delhi AN - OPUS4-22603 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Jakobs, Désirée A1 - Mathies, Helena A1 - Abraham, W.-R. A1 - Pritzkow, Wolfgang A1 - Stephan, Ina A1 - Noll, Matthias T1 - Biodegradation of a biocide (Cu-N-cyclohexyldiazenium dioxide) component of a wood preservative by a defined soil bacterial community N2 - The wood protection industry has refined their products from chrome-, copper-, and arsenate-based wood preservatives toward solely copper-based preservatives in combination with organic biocides. One of these is Cu-HDO, containing the chelation product of copper and N-cyclohexyldiazenium dioxide (HDO). In this study, the fate of isotope-labeled (13C) and nonlabeled (12C) Cu-HDO incorporated in wood sawdust mixed with soil was investigated. HDO concentration was monitored by high-pressure liquid chromatography. The total carbon and the δ13C content of respired CO2, as well as of the soil-wood-sawdust mixture, were determined with an elemental analyzer-isotopic ratio mass spectrometer. The concentration of HDO decreased significantly after 105 days of incubation, and after 24 days the 13CO2 concentration respired from soil increased steadily to a maximum after 64 days of incubation. Phospholipid fatty acid-stable isotope probing (PFA-SIP) analysis revealed that the dominant PFAs C19:0d8,9, C18:0, C18:1ω7, C18:2ω6,9, C17:1d7,8, C16:0, and C16:1ω7 were highly enriched in their δ13C content. Moreover, RNA-SIP identified members of the phylum Acidobacteria and the genera Phenylobacterium and Comamonas that were assimilating carbon from HDO exclusively. Cu-HDO as part of a wood preservative effectively decreased fungal wood decay and overall microbial respiration from soil. In turn, a defined bacterial community was stimulated that was able to metabolize HDO completely. KW - 16S rRNA KW - Biocide KW - PLFA KW - Stable isotope probing KW - Soil KW - Wood preservative PY - 2010 DO - https://doi.org/10.1128/AEM.01092-10 SN - 0099-2240 VL - 76 IS - 24 SP - 8076 EP - 8083 PB - American Society for Microbiology CY - Washington, DC [u.a.] AN - OPUS4-22688 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vogl, Jochen A1 - Rosner, Martin A1 - Pritzkow, Wolfgang T1 - Development and validation of a single collector SF-ICPMS procedure for the determination of boron isotope ratios in water and food samples N2 - Boron isotope studies on technical materials and geological and environmental samples are one hot topic in nowadays isotope research. Provenance studies of artefacts, food and other products might become another one, as several recent studies demonstrate. Typically boron isotope determinations have been carried out by TIMS. To open up this research field to a broader scientific community we developed two analytical procedures for boron isotope determinations based on single collector SF-ICPMS combined with a sample preparation procedure consisting of dry-ashing and a three step ion chromatographic boron-matrix separation. The developed procedures consist of one low resolution (LR) and one medium resolution (MR) procedure. The repeatability for the δ11B determination in three independently measured aliquots lies between 0.2 and 0.8‰ for the LR procedure and between 0.3 and 1.5‰ for the MR procedure. The expanded uncertainties with a coverage factor of k=2 range between 1.4 and 1.6‰ for the LR procedure and between 2.9 and 3.2‰ for the MR procedure. The accuracy, expressed as average deviation from the reference values, is 0.43‰ for the LR procedure and 0.33‰ for the MR procedure. To test the practicability of the procedures the matrix tolerance has been investigated as well and was found to be up to 2 mg kg-1 of alkaline and alkaline earth elements in the final measurement solution containing 100 µg kg-1 boron. Thus a highly efficient matrix separation for SF-ICPMS boron isotope determinations is required, similar to TIMS. PY - 2011 DO - https://doi.org/10.1039/c0ja00220h SN - 0267-9477 SN - 1364-5544 VL - 26 IS - 4 SP - 861 EP - 869 PB - Royal Society of Chemistry CY - London AN - OPUS4-23419 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weißhaupt, Petra A1 - Pritzkow, Wolfgang A1 - Noll, Matthias T1 - Nitrogen metabolism of wood decomposing basidiomycetes and their interaction with diazotrophs as revealed by IRMS N2 - Isotope ratio mass spectrometry (IRMS) is an advanced method to investigate carbon (C) and nitrogen (N) in organic samples. In particular, the N content, its isotope signature and the C/N ratio reveal important facts of nutrient cycling, niche separation and ecological food webs. In this study, the characteristics of N turnover of wood decomposing microorganisms were investigated. The growth of the white rot causing basidiomycete Trametes versicolor is enhanced after addition of ammonia or urea, whereas the brown rot causing Oligoporus placenta is not accelerated. In addition, an interaction of each fungus with atmospheric N2 assimilating (diazotrophic) bacteria was investigated. Cultivation experiments with a gas mixture of 15N2/O2 and subsequent IRMS analysis of dry biomass of the diazotrophs Azotobacter croococcum, Beijerinckia acida and Novosphingobium nitrogenifigens revealed that they assimilated up to 12% of their N from N2. The experiments reflected N availability as a prerequisite for efficient growth of decomposing basidiomycetes and diazotrophs. Fungal–bacterial co-cultivation experiments showed that depending on the growth characteristics and bacterial N2 assimilation activity N is transferred from certain bacteria into fungal biomass. Thus, the experiments gave a first indication of an interaction between wood decomposing basidiomycetes and diazotrophs, which is a novel pathway of fungal N acquisition. KW - IRMS KW - Isotope labeling KW - Microbial interaction KW - N2 assimilation KW - Nitrogen KW - Wood decomposing basidiomycetes PY - 2011 DO - https://doi.org/10.1016/j.ijms.2010.12.011 SN - 0168-1176 SN - 0020-7381 SN - 1387-3806 SN - 1873-2798 VL - 307 IS - 1-3 SP - 225 EP - 231 PB - Elsevier B.V. CY - Amsterdam AN - OPUS4-23307 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rosner, Martin A1 - Pritzkow, Wolfgang A1 - Vogl, Jochen A1 - Voerkelius, S. T1 - Development and validation of a method to determine the boron isotopic composition of crop plants N2 - We present a comprehensive chemical and mass spectrometric method to determine boron isotopic compositions of plant tissue. The method including dry ashing, a three-step ion chromatographic boron–matrix separation, and 11B/10B isotope ratio determinations using the Cs2BO2+ graphite technique has been validated using certified reference and quality control materials. The developed method is capable to determine δ11B values in plant tissue down to boron concentrations of 1 mg/kg with an expanded uncertainty of ≤1.7‰ (k = 2). The determined δ11B values reveal an enormous isotopic range of boron in plant tissues covering three-quarters of the natural terrestrial occurring variation in the boron isotopic composition. As the local environment and anthropogenic activity mainly control the boron intake of plants, the boron isotopic composition of plants can be used for food provenance studies. KW - Boron isotope variations KW - Delta-scale KW - Stable isotopes KW - Isotope reference materials KW - Provenance KW - Authenticity PY - 2011 DO - https://doi.org/10.1021/ac102836h SN - 0003-2700 SN - 1520-6882 VL - 83 IS - 7 SP - 2562 EP - 2568 PB - American Chemical Society CY - Washington, DC AN - OPUS4-23495 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -