流动注射-在线富集测定镍电解液中痕量的锌

Determination of Trace Amounts of Zinc in Nickel Electrolyte by Flow Injection On line Enrichment

本文报道用流动注射－在线富集技术原子吸收法测定镍电解液中痕量锌。将Ｚｎ 从电介液中的大量镍和其他成分中分离出来， 锌以络阴离子形式被吸附到阴离子交换树脂上。电介液中含有氯化钠， 其氯离子的浓度足以形成锌络阴离子， 测定时不必再加任何试剂。本方法每小时可测定３０ 个样品。本法的检测限为０．００２ μｇ·ｍ Ｌ－ １， 精密度为１．９％ （ＲＳＤ）， 方法快速， 节约成本， 近三年来对工厂中控制电解液质量获得很大成功。

A method for the determination of trace amount of zinc in nickel electrolyte utilizing the flow injection on line enrichment technique is reported in this paper.Atomic absorption spectrometer was used as detector.Zinc was separated from large amounts of nickel and other components in the electrolyte by absorption its chlorocomplex on a mini column packed with strongly basic anion exchangers.It was found that sodium chloride containing in the electrolyte offered a sufficient chloride concentration needed for the formation of the zinc chlorocomplex and thus no additional reagent was required for the determination.The throughput of the method is 30 determinations per hour.The detection limit of the method is 0 002 μg·mL -1 and the precision is 1 9% (RSD).The proposed method is rapid and cost effective.It has been used for almost three years in the quality control of the electrolyte in the factory with great success.