Isotopic precision for a lead species (PbEt4) using capillary gas chromatography coupled to inductively coupled plasma-multicollector mass spectrometry |
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| Institution: | 1. LCABIE/CNRS, Helioparc Pau Pyrenees, 2, Av. P. Angot, 64053 Pau Cedex 9, France;2. Lancaster University, Bailrigg, Lancaster LA1 4YW, UK;3. TJA Solutions, Ion Path, Road Three, Winsford, Cheshire CW7 3BX, UK;4. Environmental Analytical Laboratory, Laboratories for Applied Science, BGU, 9 Dishon Street, Malkha, Jerusalem, Israel, 96956;1. Department of Physics, Catholic University of America, Washington, DC 20064, USA;2. Moscow Institute of Physics and Technology (PhysTech), Moscow, Russia;1. Sorbonne Universités, Paris, France;2. UMR BOREA, Biologie des Organismes et des Ecosystèmes Aquatiques, UMR MNHN/CNRS 7208/UPMC/UCN/UA/IRD 207, Muséum National d’Histoire Naturelle, 75005 Paris, France;3. ID21, European Synchrotron Radiation Facility, 38000 Grenoble, France;4. Central Facility for Electron Microscopy, University of Ulm, 89069 Ulm, Germany;5. UMR MONARIS, De la Molécule aux Nano-Objets: Réactivité, Interactions et Spectroscopies, UMR 8233 CNRS-Université Pierre et Marie Curie, 75005 Paris, France;6. Institut de Systématique, Evolution, Biodiversité, Muséum National d’Histoire Naturelle, 75005 Paris, France;1. Sorbonne Universités, UPMC Univ Paris 06, Institut Universitaire de France, UMR-CNRS 8232, IPCM, F-75005 Paris, France;2. Glycochemistry Group of “Organic Synthesis” Team, Université de Poitiers, UMR-CNRS 7285 IC2MP, 4 rue Michel Brunet, 86073 Poitiers Cedex 9, France;3. Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan;1. LMAP UMR CNRS 5142, IPRA BP 1155, 64013 Pau Cedex, France;2. Fakultät für Mathematik, Thea-Leymann-Str. 9, 45127 Essen, Germany;1. WA Organic and Isotope Geochemistry Centre, Department of Earth and Planetary Sciences, Curtin University, WA, Australia;2. School of Earth Sciences, University of Western Australia, WA, Australia;1. HEC, University of Liège, Belgium;2. CREPP, Belgium;3. CORE, University of Louvain, Belgium;4. TSE, France |
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| Abstract: | Precision and accuracy of lead isotope ratios of a volatile lead species (PbEt4) were determined by coupling a capillary GC to a magnetic sector multicollector ICP-MS. PbEt4 was prepared by ethylation of a certified lead isotope solution (NIST SRM 981). Coupling was achieved by a transfer line, which allowed simultaneous introduction of a thallium standard solution to correct for mass discrimination. Seven isotopes (202Hg, 203Tl, 204Pb, 205Tl, 206Pb, 207Pb, 208Pb) were monitored simultaneously with a transient resolution of 50 ms. Pb isotope ratios for the PbEt4 peaks were calculated using transient peak integrals of each isotope signal. Absolute detection limits were 20 (204Pb), 0.7 (206Pb), 1 (207Pb) and 0.3 pg (208Pb). Precision was assessed for five replicate injections of PbEt4 in iso-octane, corresponding to a total amount of 300 pg of Pb. Precision of isotope ratios for 206Pb, 207Pb and 208Pb were better than 0.07% (RSD), with ratios including 204Pb being one order of magnitude worse. Accuracy using mass bias correction via 203Tl/205Tl ranged from 0.18% for 208Pb/206Pb to 0.9% for 208Pb/204Pb. |
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