沉淀分离金-电感耦合等离子体原子发射光谱法测定镀金溶液中铁、钴、镍、铜、银、铅

ICP-AES Determination of Iron,Cobalt,Nickel,Copper,Silver and Lead in Gold Plating Bath Solution After Separation of Gold by Precipitation

提出了用电感耦合等离子体原子发射光谱法测定镀金槽液中铁、钴、镍、银、铜及铅6元素，镀液中的金预先用硫酸及过氧化氢沉淀法予以分离，对试样的处理，沉淀分离，AES测定及仪器工作参数等分析条件作了试验并予以优化，测得上述6元素的检出限（3S）在0．0024～0．067mg·L^-1之间。按所提出方法分析了两种低氰镀金槽液样品，并在此基础上加入不同量的6元素标准溶液后进行回收试验，所得回收率在83．0％～120．0％之间，相应测定值的相对标准偏差（n=5）在2．36%～11．83％之间。

A method of ICP-AES determination of iron, cobalt, nickel, copper, silver and lead in gold plating bath solution, after removal of gold from the solution by precipitation with H2SO4 and hydrogen peroxide, was proposed in this paper. Optimum conalytical conditions for sample treatment and precipitation separation, as well as for AES determination and working parameters of the instrument were described. Detection limits （3S） of the 6 elements found were in the range of 0. 002 4 mg · L^-1 to 0. 067 mg · L^-1. Tests for recovery were made on the base of 2 samples of low cyanide containing gold plating solutions by addition of different amounts of standard solutions of the six elements, and analyzed by the proposed method. Values of recovery obtained were in the range of 83.0% to 120. 0%, with values of RSD＇s （n=5） in the range of 2. 36% to 11.83%.