Author： Cox Dennis H.
Publisher： Oxford University Press
ISSN： 0146-4760
Source： Journal of Analytical Toxicology, Vol.4, Iss.4, 1980-07, pp. : 207-211
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Abstract
An arsine evolution-electrothermal atomic absorption method is described for the determination of ng/mL concentrations of total arsenic in urine and water. Organic-arsenic compounds are decomposed with nitric, sulfuric, and perchloric acids. Sodium borohydride, a redesigned hydride generator, and an electric-heated absorption tube are used for arsine evolution and its conversion to atomic arsenic. The method has a detection limit of 6 ng/mL, a sensitivity of 1 ng/mL, and is linear from 0 to 110 ng/mL of arsenic. Accuracy was established with two different National Bureau of Standards Standard Reference Materials, and mean errors from 0 to −2 were obtained.
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