Improvements of hydride generation for the speciation of arsenic in natural freshwater samples by HPLC-HG-AFS
Bohari, Y.; Astruc, A.; Astruc, M.; Cloud, J.; Bohari Y.; Department of Chemistry, Mulawarman University; Astruc A.; L.C.A.B.I.E. UMR CNRS, 5034 Université de Pau et des Pays de l'Adour; Astruc M.; L.C.A.B.I.E. UMR CNRS, 5034 Université de Pau et des Pays de l'Adour; Cloud J.; Société Spectrafrance SA, Helioparc Pau Pyrénées
Журнал:
Journal of Analytical Atomic Spectrometry
Дата:
2001
Аннотация:
A new gasâ 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 5â 7â pgâ As for the four arsenic species usually encountered in water samples: As(iii), As(v), monomethylarsonic acid (MMAA) and dimethylarsinic acid (DMAA). Using a 100â µl injection volume the concentration detection limits were in the range 0.05â 0.07â ngâ ml<sup>â 1</sup>. The optimised procedure was applied to determine arsenic speciation in a wide range of natural fresh water samples.
85.77Кб