ISO 5786:1978

Ammonium sulphate for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric method

Describes a method applicable to products having arsenic contents euqal to or greater than 0,1 mg/kg. The principle consists in dissolving a test portion, acidifying it with hydrochloric acid solution and applying the general method as described in ISO 2590. Provides information on the expression of results and the particulars to be included in the test report. The annex lists ISO publications covering the same subject.