饮用水中亚氯酸盐的快速检测方法研究

Study of rapid test method for determination of chlorite in drinking water

目的建立生活饮用水中亚氯酸盐的快速检测方法。方法利用N,N-二乙基对苯二胺（DPD）分光光度法原理,采用自主研制的余氯、二氧化氯五参数快速检测仪对饮用水中亚氯酸盐进行测定,将国家标准检验方法中的离子色谱法与快速检测方法的测定结果进行对比分析。结果在低（0.10 mg/L）、中（0.60 mg/L）、高（1.80 mg/L）3种不同浓度下,快速检测方法的相对标准偏差（RSD）为1.88%-8.94%,加标回收率为83.3%-108.0%,水样测定结果与国家标准检验方法检测结果差异无统计学意义（P〉0.05）。结论快速检测方法将所需试剂集成为试剂盒,大大节省了试剂用量,降低了实验分析成本,与国家标准检验方法相比,简化了分析过程,产生的废水废液少。快速检测仪操作简单快速,携带方便,适合用于生活饮用水中亚氯酸盐的测定。

Objective To establish a rapid method for the determination of chlorite in drinking water. Methods The chlorite in drinking water was detected with our residual chlorine- chlorine dioxide five parameters rapid test analyzer,which is based on N,N- diethyl para- phenylene diamine（ DPD） spectrophotometry principle,and the determination results with ion chromatographic method were compared with that by the ion chromatography in the national standard test methods. Results Under low（ 0. 10 mg/L）,medium（ 0. 60 mg/L）,high（ 1. 80 mg/L） concentrations,rapid detection was conducted,and the relative standard deviation（ RSD） was among 1. 88%- 8. 94%,with recoveries of 83. 3%- 108. 0%. There was no statistical significance on the difference of detection results between with the rapid test method and with the national standard method（ P〈0. 05）. Conclusion The rapid test method integrates the reagents into a reagent box,so the reagents and the cost can be greately saved,meanwhile,the analysis procedure was simplified and waste liquid was lessened,compared to the national standard method. The rapid detector is simple,rapid and convenient,and it is suitable for the determination of chlorite in drinking water.