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拟定了分离测定铅锌精矿中游离硫化银和游离自然银的方法。用硫酸-硫脲-硫代乙醇酸溶液选择溶解硫化银;用硫酸-硫脲-硫酸高铁铵溶液选择溶解自然银。方铅矿、闪锌矿和一定量的黄铜矿、黄铁矿和毒砂存在不影响浸取率。
A method for the separation and determination of free silver sulfide and free natural silver in lead-zinc concentrates was developed. Use sulfuric acid - thiourea - thioglycolic acid solution to choose to dissolve silver sulfide; sulfuric acid - thiourea - ammonium ferric sulfate solution to choose to dissolve natural silver. Galena, sphalerite and a certain amount of chalcopyrite, pyrite and arsenopyrite do not affect the leaching rate.