INTERFERENCE BY VOLATILE NITROGEN OXIDES AND TRANSITION-METAL CATALYSIS IN THE PRECONCENTRATION OF ARSENIC AND SELENIUM AS HYDRIDES.

R. M. Brown, R. C. Fry, J. L. Moyers, S. J. Northway, M Bonner Denton, G. S. Wilson

Research output: Contribution to journalArticle

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Abstract

When tested individually in a clean system, NO//3** minus and HNO//3 are shown not to be serious inhibitors of AsH//3 and H//2Se evolution. The real inhibitors of AsH//3 and H//2Se evolution (encountered when solid samples are oxidatively dissolved in nitric acid) are shown to be correspondingly reduced nitrogen oxides (NO//2** minus , etc. ) produced in sample digestion. Volatile NO//x interferants can then result upon acidic disproportionation. These volatile NO//x species are found to transport with the AsH//3 and H//2Se analyte. The N//2O//3 species is detected in a cryogenic trap.

Original languageEnglish (US)
Pages (from-to)1560-1566
Number of pages7
JournalAnalytical Chemistry
Volume53
Issue number11
Publication statusPublished - Sep 1981

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ASJC Scopus subject areas

  • Analytical Chemistry

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