分光光度法测定锌-锰电镀液中微量镉

摘要

采用镉(Ⅱ)-碘化钾-罗丹明高灵敏度显色体系,直接测定辞-锰电镀液中的微量镉.镀液中Cd (Ⅱ)的检出限为0.59μg/L,回收率为96.5％～103.3％,线性范围为0～0.18 μg/mL,相对标准偏差RSD≤3.23％(n=8).该方法无需分离基体,结果准确、快速,能满足实际生产的要求.%A method for immediate determination of trace cadmium in zinc-manganese electrolyte solution with high sensitivity system of Cd(II)-potassium iodide-rhodamine has been introduced. In the electrolyte solution, the detection limit of cadmium was 0. 59 μg/L,recoveries were 96. 5 %～103. 3 %,the liner range was 0～0. 18 μg/mL and relative standard deviation was better than 3. 23 % (n = 8). This method requires no separation of the matrix and can meet the demands of production with a quick and accurate result.