含卤化银玻璃中氯含量的简便测定方法

A Simple Method for Determination of Chlorine Content in Silver Halide Glass

该文提出了含卤化银玻璃中氯含量的简便测定方法-汞量法,该方法通过采用氢氧化钾熔解玻璃样品,使用热水和硝酸浸取熔融物,稀硝酸调节pH值,并采用二苯偶氮碳酰肼做指示剂,通过使用硝酸汞滴定来测定含卤化银玻璃中氯的含量。最终试验数据加标回收率达97.9%~101.5%,精密度RSD 2.5%,测定方法简便、快捷,可满足含对卤化银玻璃生产监测和指导的需要。

This article proposes a convenient method for the determination of chlorine content in silver halide glass(mercury method).This method uses potassium hydroxide to melt the glass sample,uses hot water and nitric acid to extract the melt,and dilute nitric acid to adjust the pH value.Using diphenylcarbazone as an indicator,the content of chlorine in silver halide glass is determined by titration with mercury nitrate.The final test data recovery rate is 97.9%~101.5%,and the precision is RSD 2.5%.This determination method is simple and fast,and it can meet the needs of monitoring and guidance for the production of silver halide glass.