Free Access
Issue |
Analusis
Volume 27, Number 9, November 1999
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Page(s) | 795 - 803 | |
Section | Original articles | |
DOI | https://doi.org/10.1051/analusis:1999146 |
Analusis 27, 795-803 (1999)
DOI: 10.1051/analusis:1999146
1 Laboratoire de Chimie Analytique Bioinorganique et Environnement, E.P.132, Département de Chimie, Faculté des Sciences et Techniques, Avenue de l'Université, 64000 Pau, France
2 Département de Chimie Organique Fine, Université Montpellier II des Sciences et Techniques, 34095 Montpellier 5, France
(Received April, 21, 1999; revised July, 18, 1999; accepted July, 21, 1999.)
Key words: Atomic absorption spectrometry -- hydride generation -- arsenic -- arsenite -- arsenate -- methylarsenic acid -- dimethylarsenic acid -- trimethylarsine oxide -- speciation -- environmental samples.
© EDP Sciences, Wiley-VCH 1999
DOI: 10.1051/analusis:1999146
Arsenic speciation by hydride generation-Quartz furnace atomic absorption spectrometry. Optimization of analytical parameters and application to environmental samples
N. Molénat1, A. Astruc1, M. Holeman1, G. Maury2 and R. Pinel11 Laboratoire de Chimie Analytique Bioinorganique et Environnement, E.P.132, Département de Chimie, Faculté des Sciences et Techniques, Avenue de l'Université, 64000 Pau, France
2 Département de Chimie Organique Fine, Université Montpellier II des Sciences et Techniques, 34095 Montpellier 5, France
(Received April, 21, 1999; revised July, 18, 1999; accepted July, 21, 1999.)
Abstract
Analytical parameters of hydride generation, trapping, gas chromatography and atomic absorption spectrometry detection in a quartz cell furnace (HG/GC/QFAAS) device have been optimized in order to develop an efficient and sensitive method for arsenic compounds speciation. Good performances were obtained with absolute detection limits in the range of 0.1 - 0.5 ng for arsenite, arsenate, monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA) and trimethylarsine oxide (TMAO). A pH selective reduction for inorganic arsenic speciation was successfully reported. Application to the accurate determination of arsenic compounds in different environmental samples was performed.
Key words: Atomic absorption spectrometry -- hydride generation -- arsenic -- arsenite -- arsenate -- methylarsenic acid -- dimethylarsenic acid -- trimethylarsine oxide -- speciation -- environmental samples.
© EDP Sciences, Wiley-VCH 1999