TY - JOUR A1 - Semkova, V. A1 - Reimer, P. A1 - Altzitzoglou, T. A1 - Plompen, A.J.M. A1 - Quétel, C. A1 - Sudár, S. A1 - Vogl, Jochen A1 - Koning, A.J. A1 - Qaim, S.M. A1 - Smith, D.L. T1 - Neutron activation cross sections on lead isotopes KW - Cross sections KW - Neutron activation KW - Lead isotopes PY - 2009 DO - https://doi.org/10.1103/PhysRevC.80.024610 SN - 0556-2813 SN - 1089-490X VL - 80 IS - 2 SP - 024610-1 - 024610-12 PB - Inst. CY - Woodbury, NY, USA AN - OPUS4-20698 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rosner, Martin A1 - Pritzkow, Wolfgang A1 - Vogl, Jochen T1 - Boron isotope compositions of food: A potential tool for food authentication T2 - Jahrestagung Deutsche Mineralogische Gesellschaft 2008 CY - Berlin, Deutschland DA - 2008-09-14 KW - Boron isotopes KW - Food KW - Provenance studies PY - 2008 SP - 1 CY - Berlin AN - OPUS4-20785 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ma, L. A1 - Feng, L. A1 - Hioki, A. A1 - Cho, K.H. A1 - Vogl, Jochen A1 - Berger, Achim A1 - Turk, G. A1 - Macleod, S. A1 - Labarraque, G. A1 - Tong, W.F. A1 - Schiel, D. A1 - Yafa, C. A1 - Valiente, L. A1 - Konopelko, L.A. A1 - Quetel, C. A1 - Vermaercke, P. A1 - Manzano, J.V.L. A1 - Linsky, M. A1 - Cortés, E. A1 - Tangpitayakul, S. A1 - Plangsangmas, L. A1 - Bergamaschi, L. A1 - Hearn, R. T1 - International comparison of the determination of the mass fraction of cadmium, chromium, mercury and lead in polypropylene: the Comité Consultatif pour la quantité de matière pilot study CCQM-P106 KW - Cadmium KW - Chromium KW - Mercury KW - Lead KW - Polypropylene KW - CCQM PY - 2010 DO - https://doi.org/10.1007/s00769-009-0574-z SN - 0949-1775 SN - 1432-0517 VL - 15 IS - 1 SP - 39 EP - 44 PB - Springer CY - Berlin AN - OPUS4-20787 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vogl, Jochen A1 - Koenig, Maren A1 - Pritzkow, Wolfgang A1 - Riebe, Gundel T1 - Development of reference procedures for the quantification of toxic metals and S in plastics N2 - The quantitative analysis of toxic metals in plastics is very important for different sectors of industry and daily life. Many routine procedures have been established based on X-ray fluorescence or inductively coupled plasma atomic emission spectrometry. However, all of them require suitable reference materials to calibrate or validate. These reference materials ideally are being certified by reference procedures. The development of such reference procedures for sulfur and the four toxic elements cadmium, chromium, mercury and lead in plastics is described here. The procedures are based on double isotope dilution mass spectrometry including analyte–matrix separation. The applied mass spectrometric techniques are thermal ionization mass spectrometry as well as inductively coupled plasma mass spectrometry. Memory effects of mercury and dissolution of chromium(III) oxide have been considered especially. The expanded uncertainties have been improved from the percent range down to the per mill range during the development of the procedure from the early analysis of BCR-680/681 to the recent analysis of CCQM-P106. With the fully developed procedures expanded uncertainties (k = 2) between 0.1 and 0.4% for cadmium, chromium, lead and sulfur and around 1% for mercury can be achieved. The so developed procedures have been successfully applied to the certification of reference materials as well as to intercomparisons organized by CCQM. KW - ICPMS KW - TIMS KW - Reference materials KW - IDMS PY - 2010 DO - https://doi.org/10.1039/c0ja00034e SN - 0267-9477 SN - 1364-5544 VL - 25 IS - 10 SP - 1633 EP - 1642 PB - Royal Society of Chemistry CY - London AN - OPUS4-22044 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ostermann, Markus A1 - Kettisch, P. A1 - Becker, Dorit A1 - Vogl, Jochen T1 - Measurements of sulfur in oil using pressurised wet digestion technique in open vessels and isotope dilution mass spectrometry KW - Wet digestion KW - Open vessel digestion KW - Sulfur in oil KW - Reference materials KW - TIMS KW - IDMS PY - 2003 UR - http://www.springerlink.com/content/b7alk8lgly2v/?p=6237db8a9c28481d87e7b017e6474b73&pi=88 SN - 1618-2642 SN - 1618-2650 VL - 377 IS - 4 SP - 779 EP - 783 PB - Springer CY - Berlin AN - OPUS4-2738 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vogl, Jochen A1 - Klingbeil, Patrick A1 - Pritzkow, Wolfgang A1 - Riebe, Gundel T1 - High accuracy measurements of Fe isotopes using hexapole collision cell MC-ICP-MS and isotope dilution for certification of reference materials N2 - An ICP-MS equipped with collision cell, sector field and multi-collector technology has been applied to developing analytical procedures for Fe in terms of isotope ratio measurements and isotope dilution analysis. Therefore a detailed study on the reduction of molecular interferences by a variety of collision gases (He, Ar, Kr, H2, D2 and N2) was performed. The efficiency of the reduction has been checked by high resolution mass scans. The argon based interferences disturbing the determination of 54Fe and 56Fe could be completely removed when using Faraday detectors. The interferences on mass 57 could be reduced to a level which enables accurate measurements. Also, the 40Ar12C interference, which disturbs the chromium correction, could be completely removed. Reproducibilities of 0.01% could be reached for 54Fe/56Fe isotope ratios and 0.02% for 57Fe/56Fe isotope ratios. Under these measurement conditions a sensitivity of 1.2 V per 50 µg kg–1 Fe is available. This corresponds to 1.5 × 109 cps per mg kg–1. Based on these results highly accurate procedures for Fe isotope ratio determinations were set up, reaching a performance level superior to that of other ICP-MS instruments. Consequently, IDMS procedures were developed on this basis in order to perform certification measurements at the highest metrological level. The first application was the contribution to the Fe reference value by IMEP-12, an interlaboratory comparison with approximately 350 participants worldwide. The analysed Fe mass content is 0.2150 mg kg–1 with its expanded uncertainty (k= 2) of 0.0012 mg kg–1(0.56%), which is ten times less than the uncertainty of the second certification laboratory. Another application was the certification campaign of the two reference materials Tea Leaves and Polish Herbs. The results obtained with the ICP-MS procedure, 542 ± 11 mg kg–1 and 543 ± 12 mg kg–1, were compared with the results analysed by TIMS, 541 ± 12 mg kg–1 and 541 ± 13 mg kg–1, and agree very well within the stated uncertainties (k= 2). The results presented demonstrate quite well the suitability of the developed IDMS procedures for certification or reference measurements. PY - 2003 DO - https://doi.org/10.1039/b301812a SN - 0267-9477 SN - 1364-5544 VL - 18 SP - 1125 EP - 1132 PB - Royal Society of Chemistry CY - London AN - OPUS4-2739 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Vogl, Jochen T1 - Einstieg in die massenspektrometrische Isotopenverdünnungsanalyse T2 - 1. Workshop "Isotopenverdünnungsanalyse mit ICP-MS" CY - Berlin, Germany DA - 2002-11-11 PY - 2002 AN - OPUS4-3006 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Vogl, Jochen T1 - Fortschritte in der Isotopenverhältnis- und Isotopenverdünnungsanalyse - "Anything elements do, isotopes do better" T2 - Jahrestagung der DGMS 2002 CY - Heidelberg, Germany DA - 2002-03-03 PY - 2002 AN - OPUS4-3007 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Vogl, Jochen T1 - Zertifizierung von Referenzmaterialien sowie Referenzanalysen mittels T2 - IDMSBeraterkreis I. Abteilung CY - Berlin, Germany DA - 2002-05-08 PY - 2002 N1 - Geburtsname von Dudek, Gabriele: Wermann, G. - Birth name of Dudek, Gabriele: Wermann, G. AN - OPUS4-3008 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bohn, T. A1 - Walczyk, Th. A1 - Davidsson, L. A1 - Pritzkow, Wolfgang A1 - Klingbeil, Patrick A1 - Vogl, Jochen A1 - Hurrell, R.F. T1 - Comparison of urinary monitoring, faecal monitoring and erythrocyte analysis of stable isotope labels to determine magnesium absorption in human subjects KW - Magnesium absorption KW - Stable isotopes KW - Faecal monitoring KW - Urinary monitoring KW - Erythrocytes PY - 2004 SN - 0007-1145 SN - 1475-2662 VL - 58 SP - 113 EP - 120 PB - CABI Publ. CY - Wallingford AN - OPUS4-3362 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Diemer, J. A1 - Vogl, Jochen A1 - Quétel, C.R. A1 - Linsinger, T. A1 - Taylor, P.D.P. A1 - Lamberty, A. A1 - Pauwels, J. T1 - SI-traceable certification of the amount content of cadmium below the ng g-1 level in blood samples by isotope dilution ICP-MS applied as a primary method of measurement N2 - The development and implementation of a method for the certification of cadmium in blood samples at low ng g-1 and sub ng g-1 levels is described. The analytical procedure is based on inductively coupled plasma isotope dilution mass spectrometry (ICP-IDMS) applied as a primary method of measurement. Two different sample digestion methods, an optimized microwave digestion procedure using HNO3 and H2O2 as oxidizing agents and a high-pressure asher digestion procedure, were developed and compared. The very high salt content of the digests and the high molybdenum content, which can cause oxide-based interferences with the Cd isotopes, were reduced by a chromatographic matrix separation step using an anion-exchange resin. All isotope ratio measurements were performed by a quadrupole ICP-MS equipped with an ultrasonic nebulizer with membrane desolvator. This sample introduction set-up was used to increase sensitivity and minimize the formation of oxides (less MoO+ interference with the Cd isotopes). Because of the very low Cd concentrations in the samples and the resulting need to minimize the procedural blank as much as possible, all sample-processing steps were performed in a clean room environment. Detection limits of 0.005 ng g-1 Cd were achieved using sample weights of 2.7 g. The method described was used to re-certify the cadmium content of three different blood reference materials from the Community Bureau of Reference (BCR) of the European Commission (BCR-194, BCR-195, BCR-196). Cadmium concentrations ranged between ~0.2 ng g-1 and ~12 ng g-1. For these materials, SI-traceable certified values including total uncertainty budgets according to ISO and Eurachem guidelines were established. PY - 2001 DO - https://doi.org/10.1007/s002160100813 SN - 0937-0633 VL - 370 SP - 492 EP - 498 PB - Springer CY - Berlin AN - OPUS4-3363 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -