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现有的测定镍的容量分析方法很多,但准确、简便、快速者不多。目前最常用的是将Ni~(2+)先用丁二酮肟沉淀,过滤,洗涤后,重新溶解,再用EDTA滴定,以红紫酸铵或茜素S为指示剂,滴定时pH控制要求严格。用丁二肟为滴定剂测镍的安培滴定法也有报导,但由于操作麻烦,很少在实际中应用。另外,在氨性溶液中用丁二肟碱性溶液直接滴定镍的办法也有报导,但因使用外指示剂误差较大。
There are many methods to analyze the capacity of nickel, but it is accurate, simple and fast. At present, Ni 2+ is first precipitated with dimethylglyoxime, filtered, washed, redissolved, titrated with EDTA, ammonium red or alizarin S as an indicator, and pH-controlled during titration Strict requirements. Antimicrobial titration of nickel with butadiene dioxime as a titrant has also been reported, but it is seldom used in practice due to the cumbersome operation. In addition, the direct titration of nickel with butadiene dioxime alkaline solution in ammonia solution has also been reported, but the external indicator has larger error due to the use of external indicator.