Speciation of Arsenic Oxides Using Laser Desorption/Ionization Time-of-Flight Mass Spectrometry

Todd M. Allen, Dawit Z. Bezabeh, Catherine H. Smith, Eileen M. McCauley, A. Daniel Jones, Daniel P Y Chang, Ian M. Kennedy, Peter B. Kelly

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Positive and negative ion mass spectra of arsenic trioxide (As2O3) and arsenic pentaoxide (As2O5) have been obtained by single-step laser desorption/ionization time-of-flight mass spectrometry. Pulsed UV radiation at 266 nm was used for the simultaneous desorption and ionization of the solid sample. High-mass cluster ions that are unique to the oxidation state of each oxide sample appear in the negative ion mass spectra. The As2O3 produces As3O5 -, while the As2O5 yields As3O8 -. The formation of unique negative cluster ions presents the capability for arsenic oxidation state speciation by laser desorption/ ionization mass spectrometry. The ability of time-of-flight mass spectrometry to examine the relative amounts of each arsenic oxide present in a series of mixtures is discussed. Application of our speciation technique to a model incinerator sample is demonstrated.

Original languageEnglish (US)
Pages (from-to)4052-4059
Number of pages8
JournalAnalytical Chemistry
Volume68
Issue number22
StatePublished - Nov 15 1996

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Arsenic
Oxides
Ionization
Mass spectrometry
Desorption
Lasers
Negative ions
Ions
Oxidation
Refuse incinerators
Ultraviolet radiation
Positive ions
arsenic trioxide

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Allen, T. M., Bezabeh, D. Z., Smith, C. H., McCauley, E. M., Jones, A. D., Chang, D. P. Y., ... Kelly, P. B. (1996). Speciation of Arsenic Oxides Using Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. Analytical Chemistry, 68(22), 4052-4059.

Speciation of Arsenic Oxides Using Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. / Allen, Todd M.; Bezabeh, Dawit Z.; Smith, Catherine H.; McCauley, Eileen M.; Jones, A. Daniel; Chang, Daniel P Y; Kennedy, Ian M.; Kelly, Peter B.

In: Analytical Chemistry, Vol. 68, No. 22, 15.11.1996, p. 4052-4059.

Research output: Contribution to journalArticle

Allen, TM, Bezabeh, DZ, Smith, CH, McCauley, EM, Jones, AD, Chang, DPY, Kennedy, IM & Kelly, PB 1996, 'Speciation of Arsenic Oxides Using Laser Desorption/Ionization Time-of-Flight Mass Spectrometry', Analytical Chemistry, vol. 68, no. 22, pp. 4052-4059.
Allen TM, Bezabeh DZ, Smith CH, McCauley EM, Jones AD, Chang DPY et al. Speciation of Arsenic Oxides Using Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. Analytical Chemistry. 1996 Nov 15;68(22):4052-4059.
Allen, Todd M. ; Bezabeh, Dawit Z. ; Smith, Catherine H. ; McCauley, Eileen M. ; Jones, A. Daniel ; Chang, Daniel P Y ; Kennedy, Ian M. ; Kelly, Peter B. / Speciation of Arsenic Oxides Using Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. In: Analytical Chemistry. 1996 ; Vol. 68, No. 22. pp. 4052-4059.
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