生活饮用水中氰化物测定方法的改进

An Improved Method for Determination of Cyanide in Drinking Water

目的为解决基层实验室难以购买到合格的氯胺T问题。方法采用漂白粉制取有效氯溶液代替氯胺T ,对生活饮用水中氰化物的测定方法作了改进。结果氰化物在0～2 0μg/25ml范围内符合比尔定律。最低检出量为0 04μg,相对标准偏差为2 69%～3 09 % ,回收率为97 50 %～99 17 %。结论该方法测定饮用水中氰化物简单易行 ,精密度、准确度好。

Objective To resolve the problem that qualified chloramine T was difficult to purchase for some basic laboratories Methods Using the solution of available chlorine prepared by bleaching power instead of chloramine T, the method for determination of cyanide in drinking water was improved Results The data obtained by this assay accorded with Beers Law in the range of 0～2 0 μg/25 ml cyanide The detection limit,relative standard deviation,and recovery rate were 0 04μg,2 69%～3 09% and 97 50%～99 17% respectively Conclusion This method for determination of cyanide in drinking water was simple and easy to operate and presented good precision and accuracy