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This method is quantitative for arsenic using digestion with nitric, perchloric and sulfuric acids, reduction of arsenate to arsenite, and determination by vapor generation Inductively-Coupled Plasma Emission Spectrometer (ICP-AES). The method has a detection limit of approximately 0.10 ppm. 

Sample material should be powdered and should pass a 1 mm sieve.

Sample amount requested:  3 g

Questions concerning limited sample size can be answered by the UC Davis Analytical Laboratory.

Tracy, M. L. and Moeller, G. 1990. Continuous flow vapor generation for inductively coupled argon plasma spectrometric analysis. Part 2: Arsenic. J. Assoc. Off. Anal. Chem. 74:516-521.