电镀业中常在电镀液中加入柠檬酸盐以提高镀件的质量,其测定大多采用高锰酸钾,碘酸钾氧化法当镀液中含有氯化物时,由于氯离子也会与这两种氧化剂作用,所以测定前需将它们分离,否则结果偏高。本文采用高价铈盐做氧化剂,在硫酸介质中测定镀镍液中的柠檬酸三钠。在一定条件下,氯离子不干扰测定,方法简便,高价铈盐溶液极稳定,用亚铁盐回滴时终点明显。 In the electroplating industry, citric acid salts are often added to the plating solution to improve the quality of the plating. Most of the measurement uses potassium permanganate and potassium iodate oxidation method. When chloride is contained in the plating solution, Oxidants, so they need to be measured before separation, otherwise the result is high. In this paper, the use of expensive cerium salt as oxidant, sulfuric acid in the determination of nickel plating solution of trisodium citrate. Under certain conditions, chloride ion does not interfere with the determination, the method is simple, high-priced cerium salt solution is very stable, end-point with ferrous salt drops back significantly.