流动注射分析法测定地表水中的水合肼

Determination of Hydrazine Hydrate in Surface Water by Flow Injection Analysis

利用流动注射分析法代替传统分光光度法测定地表水中的水合肼，试验优化了显色剂配比和反应圈个数。结果表明当显色剂中水∶乙醇配比为9∶1且反应圈个数为3个时为最优方法条件。方法线性相关系数为1．0000，检出限为0．00032 mg／L，精密度为0．69％～1．39％，水样加标回收率为91．0％～107．8％。使用统计检验法比较两种方法测定的数据无显著性差异。流动注射分析法自动化程度高，人工误差小，检测结果准确可靠，适合大批量水样的检测。

By setting the analysis module,flow injection analysis method was used to determine the hydrazine hydrate in surface water as a replacing method with the spectrophotometric method. The allocation of the color developing agent as well as the number of reaction ring was optimized in this paper. The results show when ratio of water to ethanol is 9∶1 and reaction rings are 3,the linear coefficient is 1. 000 0, minimum detection limit is 0. 000 32 mg/L,relative standard deviation is 0. 69%~1. 39% and standard addition recovery is 91. 0%~107. 8%. There is no significant difference between the results of two methods with statistical tests. Flow injection analysis has a higher level of automation with less artificial errors,which increases the efficiency and reliability,which may detect more samples than before.