火焰原子吸收光谱法测定电解锰电解液中铁钴镍

FAAS DETERMINATION OF IRON COBALT AND NICKEL IN MANGANESE ELECTROLYTIC SOLUTION

在标准溶液中加入匹配的硫酸铵和硫酸锰溶液 ,用氨水调节 p H至中性后 ,用火焰原子吸收光谱法直接测定电解锰电解液中铁、钴和镍含量 ,获得了满意的效果。其倍比试验、标准曲线法、标准加入法结果相吻合 ,样品加标回收率为 94.8%～ 1 0 6.4% ,相对标准偏差为 2 .1 %～ 3.1 %。方法简便、快速 。

A method for the FAAS determination of Fe, Co and Ni in manganese electrolytic solution is proposed in this paper. The interferences of the matrix manganese(Ⅱ) and large amounts of SO 2- 4 ion are compensated by the addition of appropriate amounts of Mn(Ⅱ) and SO 2- 4 ion [as MnSO 4 and (NH 4) 2SO 4] to the standards. The recoveries are found to be in the range 94.8%~106.4%, and the RSD′s are found to be in the range 2.1%~3.1%. The results obtained by the calibration curve method are in good conformity with those obtained both by standard addition method and double ratio experiments. The proposed method is proved to be rapid, accurate and convenient.