含硫、铜硅酸盐岩石中亚铁的测定

本实验拟定了两个测定含硫、铜硅酸盐岩石中亚铁的测定方法: 1.含硫量低于5％的岩石,采用盐酸—醋酸—氟化铵,煮沸分解酸溶性亚铁。

Determination df Ferrous Iron .in Silicates Containing S and Cu

Determination of ferrous iron in sillcates containing S and Cu wasstudied.A two step procedure was given .The sample (S<5%) was first treated with HAc-HF-HGI-NH4F;if the sample containing S more khan X% was treatedwith H2SO4-CnSO4-HF;and acid solubie ferrous iron was titrated"with standardpotassium dichiomiate solution; then the residue was fitteed out andigaited,which turns sulfide into oxide, then the iron oxide was dissolved in acidand detertizined by potassiura dichromate titration. Tie ferrous. iron content wascalcuited as the total of both results.