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Isotopic precision for a lead species (PbEt4) using capillary gas chromatography coupled to inductively coupled plasma-multicollector mass spectrometry.

Krupp, Eva and Pécheyran, Christoph and Pinaly, Hervé and Motelica-Heino, Mikael and Koller, Dagmar and Young, Suzanne M. M. and Brenner, Isaac B. and Donard, Olivier F. X. (2001) Isotopic precision for a lead species (PbEt4) using capillary gas chromatography coupled to inductively coupled plasma-multicollector mass spectrometry. Spectrochimica Acta Part B, 56 (7). pp. 1233-1240. ISSN 0584-8547

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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.

Item Type: Article
Journal or Publication Title: Spectrochimica Acta Part B
Uncontrolled Keywords: Gas chromatography/inductively coupled plasma-multicollector mass spectrometry (GC/ICP-MCMS) coupling ; Speciation ; Isotope ratio determination ; Lead
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21550
Deposited By: ep_ss_importer
Deposited On: 21 Jan 2009 11:55
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:48
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21550

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