title: Precise isotope-ratio measurements of lead species by capillary gas chromatography hyphenated to hexapole Multicollector ICP-MS.
abstract: The precision and accuracy of lead isotope-ratio determination on a short transient signal has been assessed by coupling capillary gas chromatography to the Isoprobe (Micromass, UK), a single-focusing inductively coupled plasma mass spectrometer with multicollector detection. A T-piece connecting the GC transfer line to the torch enabled continuous aspiration of thallium solution for mass-bias correction. The volatile lead species PbEt4 was derivatized from NIST isotopic certified lead standard SRM 981 and different amounts of PbEt4 dissolved in iso-octane were injected into the GC. Chromatograms were recorded in multicollection mode by use of Faraday cups; seven isotopes (204Pb, 206Pb, 207Pb, 208Pb,
authors.affiliation: LCABIE/CNRS, Helioparc Pau Pyreneés, France. eva.krupp@univ-pau.fr
authors.forename: E M
authors.initials: EM
authors.lastname: Krupp
authors.forename: C
authors.initials: C
authors.lastname: Pécheyran
authors.forename: S
authors.initials: S
authors.lastname: Meffan-Main
authors.forename: O F
authors.initials: OF
authors.lastname: Donard