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矿石中锌之测定,一般采用亚铁氰化钾法,操作手续较繁,费时较长,以 EDTA 直接滴定比较简便,但在某些干扰元素存在时,虽加入隐蔽剂,结果亦不够满意。近年来,应用离子交换法使锌与其他杂质分离,文献记载颇多。K.克劳斯(Kraus),M.莫勒(Moore)使锌在2N 盐酸溶液中,通过强阴离子交换树脂而与镍、钴、铜、铁分离。A.M.阿明(Amin)和 M.Y.法拉(Fa-rah)测定铅锌矿时,以同样方法分离杂质后,用0.025N 硝酸洗脱锌,再以 EDTA 滴定。M.弗来加尔
Determination of zinc in ore, the general use of potassium ferrocyanide method, more frequent procedures, time-consuming, direct EDTA titration is relatively simple, but in the presence of some interference elements, although the addition of covert agent, the result is not satisfactory. In recent years, the application of ion exchange method to separate zinc and other impurities, documented a lot. K. Kraus, Moore Zinc is separated from nickel, cobalt, copper, iron by strong anion exchange resin in 2N hydrochloric acid solution. When A.M. Amin and Fa-rah determined lead and zinc ores, after isolating impurities in the same manner, zinc was eluted with 0.025N nitric acid and titrated with EDTA. M. 弗莱加尔