本文利用硫氰酸铵和丙酮的混合液作显色剂,利用-阶导数消除基体镍和多数离子的干扰,对金属镍中微量钴和铁进行同时测定,结果满意。 In this paper, a mixture of ammonium thiocyanate and acetone was used as a chromogenic reagent, and the first order derivative was used to eliminate the interference of matrix nickel and most ions, and the determination of trace amounts of cobalt and iron in metallic nickel was carried out with satisfactory results.