高铈褪色光度法快速测定黑镍镀液中的硫氰酸盐

The Fast Test of Salf Thiocyanide in Black Nickel Liquid with the Method of Photometric Analysis

研究了铈(Ⅳ)氧化硫氰酸盐的褪色反应及其光度性质。实验结果表明,在硫酸介质中,铈(Ⅳ)氧化硫氰酸盐被还原成铈(Ⅲ),铈(Ⅳ)黄色的减褪与硫氰酸盐含量之间存在良好的负相关。硫氰酸盐浓度介于0.25mg/10mL-1.25mg/10mL 遵守比尔定律。应用于黑镍镀液中硫氰酸钾的测定,方法简便快捷。方法的准确度和精密度能满足生产要求。

Have studied the reaction and photometric nature with Ce (Ⅳ) oxidize salf thiocyanide.The expermental re- sulf shows,this negative relation is existence between Ce (Ⅳ) yellow's discolour and content of salf thio- cyanide.Observe Bill's law when the content of salf thiocyanide lies between 0.25mg/10mL-1.25mg/10mL.Apply to the determination of potassium thiocyanide in black nickel liquid.The method has simple and fast.The accurate and preci- sion is satisfied the production request.