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Determination of microgram amounts of arsenic in geological materials and waters by wavelength-dispersive x-ray fluorescence spectrometry

✍ Scribed by C.M. Hemens; C.M. Elson

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 321 KB
Volume: 188
Category: Article
ISSN: 0003-2670
DOI: 10.1016/s0003-2670(00)86059-6

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✦ Synopsis

Microgram quantities of arsenic are determined in geological materials or water samples by copreclpitating the analyte with elemental selenium and using x-ray fluorescence directly on the precipitate. The coprecipitation step removes elemental interferences and converts the sample to a thin film. The selenium matrix enhances the fluorescent emission of arsenic which enables 0.2 pg g-' to be determined. The method is applied to a series of geological reference materials and a seawater sample.

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