生活饮用水中氰化物的流动注射分析

Determination of Cyanide in Drinking Water by Flow Injection Analysis

目的根据异烟酸-巴比妥酸分光光度法原理,建立流动注射分析测定生活饮用水中氰化物的方法。方法生活饮用水在线蒸馏,冷凝、保温盒比色均由QC 8500流动注射分析仪自动完成。结果该方法最低检测质量浓度0.68μg/L,RSD为2.05%~3.16%,回收率在94.4%~99.5%之间。同一水样分别采用QC 8500流动注射分析仪与异烟酸-巴比妥酸分光光度法进行测定,两种方法差异无统计学意义（t=0.550,P〉0.05）。结论该方法前处理简单,分析周期短,方法准确度、精密度好,自动化强度高,安全可靠,适用于大批量样品分析。

Objective To develop flow injection analysis for determination of cyanide in drinking water by isonicotinic acid-barbituric acid spectrophotometric.Methods Drinking water samples were distillation line,condensation,heat boxes are QC8500 flow injection colorimetric analyzer automatically.Results The minimum detectable concentration was 0.68 μg/L,the relative standards deviation was 2.05 %-3.16%,recovery rate was between 94.4%-99.5%.The same water sample was tested using QC8500 flow injection analyzer and isonicotinic acid-barbituric acid spectrophotometric method,which the detection results showed that there was no significant difference（t=0.550,P0.05）.Conclusion The method has the characteristics of simplicity, accuracy,high automation and reliability,it is suitable for large amount samples analysis.