A routine method for the determination of arsenic in plants, sediments and natural waters |
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| Authors: | P F Reay |
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| Affiliation: | Applied Biochemistry Division, D.S.I.R., Palmerston NorthNew Zealand |
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| Abstract: | Coprecipitation with molybdenum sulphide in 2 M hydrochloric acid solution is proposed for the recovery of microgram amounts of arsenic from solutions prepared by ashing plants and sediments, and from natural waters. After dissolution of the sulphide precipitate, arsenic is determined photometrically by a molybdenum blue method. The overall recovery for the procedure is 99%. Arsenic was determined in solutions of plant ash at the 2-μg As level with a coefficient of variation of 0.6%. |
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