General Test Procedure Limit Test Iron

  General Test Procedure Limit Test Iron   Purpose This procedure is applicable to all incoming Raw materials. Apparatus Nessler Cylinder Reagents 20%w/v citric acid solution Thioglycollic acid AR Ammonia solution Iron Standard Solution (20ppm Fe): Dissolve 346mg of ferrous ammonium sulphate in 10ml of 1M sulphuric acid and dilute to 100ml with water. Dilute … Read more