火焰原子吸收光谱法测定镀铬液中的镍

Determination of Ni in the Chromium Plating Bath by Flame Atomic Absorption Spectrometry

采用火焰原子吸收光谱法测定镀铬液中镍，镀铬液中的高含量的六价铬通过加入高氯酸和盐酸转化为氯化铬酰气体逸出而去除。在最佳实验条件下，该法测定镍的线性范围为0～4.0μg/mL，回收率为98.2％～101.9％。本方法准确、检出限低，适合于镀铬液中镍的分析检测。

A new method for the determination of nickel in the chromium plating bath named flame atomic absorption spectrometry （FAAS） was studied. Plenty of chromium （Ⅵ） was translated to chromyl chlo-ride by adding perchloric acid and hydrochloric acid to the chromium plating bath. Under the optimum determination conditions, the linear range of nickel was 0～4.0μg/mL, and the recovery was 98.2%～101.9%. This method has high accuracy and low detection limit, which is suitable for the determination of copper and nickel in the chromium pahing bath.