Improvements of hydride generation for the speciation of arsenic in natural freshwater samples by HPLC-HG-AFS

Y. Bohari; A. Astruc; M. Astruc; J. Cloud

doi:10.1039/B101591P

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Y. Bohari,^a A. Astruc,*^b M. Astruc^b and J. Cloud^c

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* Corresponding authors

^a Department of Chemistry, Mulawarman University, Samarinda, Indonesia

^b L.C.A.B.I.E. UMR CNRS, 5034 Université de Pau et des Pays de l'Adour, Avenue de l'Université, Pau, France
E-mail: annette.astruc@univ-pau.fr

^c Société Spectrafrance SA, Helioparc Pau Pyrénées, 2 Avenue Pierre Angot, Pau Cedex 9, France

Abstract

A new gas–liquid separator was used to improve the hydride generation step of a hyphenated HPLC-HG-AFS system applied to arsenic speciation studies. Optimisation of the hydride generation atomic fluorescence detection with this new device produced by SpectraFrance led to a significant improvement in performance. Absolute detection limits were as low as 5–7 pg As for the four arsenic species usually encountered in water samples: As(III), As(V), monomethylarsonic acid (MMAA) and dimethylarsinic acid (DMAA). Using a 100 µl injection volume the concentration detection limits were in the range 0.05–0.07 ng ml⁻¹. The optimised procedure was applied to determine arsenic speciation in a wide range of natural fresh water samples.

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Article information

DOI: https://doi.org/10.1039/B101591P
Article type: Technical Note
Submitted: 19 Feb 2001
Accepted: 24 May 2001
First published: 20 Jun 2001

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J. Anal. At. Spectrom., 2001,16, 774-778

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