GB/T 23513.2-2009 《Chemical analysis methods for germanium concentrate - Part 2: Determination of arsenic content - Ferrous ammonium sulfate titration》 Related products

This standard specifies the determination method of arsenic content in germanium concentrates, which is applicable to germanium concentrates with arsenic content ranging from 0.2% to 20%. The principle of the method is to analyze the sample by nitric acid, ammonium fluoride and bromine water, and then use sulfuric acid analysis and remove the nitric acid. In muriatic acid medium, using copper sulfate as catalyst, using sodium hypophosphoric acid to reduce arsenic to elemental arsenic and filtrate the separation. Then, using potassium dichromate standard solution to oxidize arsenic to pentavalent arsenic, and then using ferrous ammonium sulfate standard solution to titrate excess potassium dichromate solution, thereby indirectly determining the arsenic content. This method ensures accurate determination of arsenic content.