流动注射分析法与分光光度法测定水中六价铬的比较

目的运用流动注射分析法及二苯碳酰二肼分光光度法对生活饮用水中六价铬进行测定，比较它们结果差异是否存在有统计学意义。方法对20份水分别用流动注射仪分析法和二苯碳酰二肼分光光度法测定其六价铬的含量。运用卫生统计学，检验配对设计中的差值均数与总体均数，对2种方法的检测结果进行分析比较。结果当检验水平α=0．20，并运用双侧检验时，（P〈0．20），样品信息支持无效假设H0。结论在一定的条件下，应用流动注射法测定水中六价铬与用二苯碳酰二肼分光光度法得到的结果差异无统计学意义，是可以推荐的方法。

Comparison between Flow Injection Analysis Method and Spectrophotography in the Determination of Chromium(Ⅵ)in Drinking Water

[Objective] To determine Chromium （Ⅵ） in drinking water with flow injection analysis method and spectrophotography respectively and find out the statistical significance between the two methods. [ Methods] Flow Injection Analysis Method and spectrophotography were applied to detect Chromium （VI） content in drinking water; hygienic statistics was used to test the different value means and total means; analysis and comparison were made on the detection result. [ Results] When the significance level α= 0.20 using double-sided test, the sample information accorded with null hypothesis Ho （ P 〉 0.20）. [ Conclusion] There is no significant difference between the result of flow injection analysis method and spectrophotography in the determination of Chromium （Ⅵ） in drinking water, it is worthy of recommendation.