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

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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
StatePublished - Sep 1981

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Nitrogen Oxides
Nitric Acid
Arsenic
Selenium
Hydrides
Cryogenics
Catalysis
Transition metals

ASJC Scopus subject areas

  • Analytical Chemistry

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INTERFERENCE BY VOLATILE NITROGEN OXIDES AND TRANSITION-METAL CATALYSIS IN THE PRECONCENTRATION OF ARSENIC AND SELENIUM AS HYDRIDES. / Brown, R. M.; Fry, R. C.; Moyers, J. L.; Northway, S. J.; Denton, M Bonner; Wilson, G. S.

In: Analytical Chemistry, Vol. 53, No. 11, 09.1981, p. 1560-1566.

Research output: Contribution to journalArticle

Brown, R. M. ; Fry, R. C. ; Moyers, J. L. ; Northway, S. J. ; Denton, M Bonner ; Wilson, G. S. / INTERFERENCE BY VOLATILE NITROGEN OXIDES AND TRANSITION-METAL CATALYSIS IN THE PRECONCENTRATION OF ARSENIC AND SELENIUM AS HYDRIDES. In: Analytical Chemistry. 1981 ; Vol. 53, No. 11. pp. 1560-1566.
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