Lead hydride generation for isotope analysis by inductively coupled plasma mass spectrometry

Xiaoru Wang, Miklos Viczian, Alexandra Lasztity, Ramon M. Barnes

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

The sensitivity and precision of the determination of trace amounts of lead can be improved significantly with a combination of continuous hydride generation, isotope dilution and inductively coupled plasma mass spectrometry (ICP-MS). Both the conventional Thompson U-shaped and a microporous polytetrafluoroethylene (PTFE) tube gas - liquid separator were evaluated. The limit of detection for lead was restricted to the range 0.01-0.05 μg l-1 by the reagent blanks. Iron and copper ions exhibit a serious interference on the lead hydride generation. Sulphosalicylic acid and sodium cyanide, dissolved in sodium tetrahydroborate(III) solution, were used to eliminate the iron and copper interferences, respectively. Lead in National Bureau of Standards (NBS) Standard Reference Material (SRM) Trace Elements in Water (1643a) was determined by the isotope dilution - hydride generation technique. Good agreement was obtained between the certified and the experimental results. Lead isotope abundances were also determined for NBS SRM 981 Common Lead and various galena samples.

Original languageEnglish
Pages (from-to)821-828
Number of pages8
JournalJournal of analytical atomic spectrometry
Volume3
Issue number6
DOIs
Publication statusPublished - Jan 1 1988

Keywords

  • Gas - liquid phase separator
  • Hydride generation
  • Inductively coupled plasma mass spectrometry
  • Isotope dilution
  • Lead isotope ratio

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

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