1.1 This Tanzania Standard prescribes methods for determination of arsenic.
1.1.1 Modified Gutzeit method of test for arsenic shall be employed in cases where arsenic content is not needed and only a knowledge of limit is desired. In cases where the actual arsenic content is to be deter-mined, silver diethyldithiocarbamate method shall be followed. The method is applicable to quantities of arsenic (As) greater than 1 ug.