流动注射法测定饮用水中氰化物

Using Flow Injection Analysis to Survey the Cyanide in Drinking Water

目的建立测定水中氰化物的流动注射分析法。方法一般样品直接进样,如果样品中含有游离余氯时先用无水亚硫酸钠溶液除氯后再测定。应用FIA6000型全自动流动注射分析仪直接在线蒸馏测定饮用水中氰化物。结果该测定方法相关性好,相关系数为0.9999,线性范围宽2.0～90.0μg/L,精密度RSD为1.95%～2.30%,方法检出限为0.156μg/L。结论方法简便、快速,干扰少,灵敏度高,有较高的实用价值,特别适合大批样品的测定。

Objective To develop a method for determination cyanide in drinking water with Flow injection. Methods By means of using flow injection analysis instrument, the cyanide in drinking water was determined on-line. Results The linear relationship of the flow injection method was in the range of 2.0 to 90 μg/L,the relative coefficient was 0.9999,the detection limit 0.156μg/L. Conclusion The experimentation has proved that this method was simple, accurate, sensitive. This analyzer is suitable for analysis of relatively large number of water samples.