苯芴酮光度法快速测定镀银溶液中的微量锑

Rapid Determination of Trace Stibium in Silver Plating Solution by Phenylfluorone Spectrophotometry

利用苯芴酮与锑(Ⅲ)的显色反应,对镀银溶液中的锑进行光度测定。试验结果表明,在乳化剂OP存在下的0.09～0.18mol/L硫酸介质中,显色体系的最大吸收波长位于560nm。表明摩尔吸光系数为5.85×104L/(mol·cm),锑浓度介于0.14～1.40μg/mL,遵守比尔定律。加标回收率97.3%～104.7%,本方法简便快速,且具有良好的选择性。

Cailiao Baohu 2004, 37( 1 ) ,58～59(Ch). Stibium(Ⅲ) ( Sb^(3+)) in silver plating bath was determined by spectrophotometry using the chromogenic reaction of phenylfluorone and Sb^(3+). Experimental results show that the maximum absorption of system is 560 nm in 0.09～0.18 mol/L H_2 SO_4 solution with emulsion OP. the apparent absorption coefficient is 5.85 x 104 L/( mol·cm) , and Beer′s law accords with Sb^(3+)concentration in the range of 0.14 ～ 1.40 μg/mL. The recovery of adding standard solution is 97.3% ～ 104.7%. The method is simple and rapid with satisfied selectivity.