在线紫外过硫酸盐消解-流动注射分析方法测定水中总氮  

Determination of TN in water by on-line UV persulfate digestion and flow injection analysis

作　　者：黄碧兰[1] 杨敏[1] 刘俩燕[1] 

机构地区：[1]广东省深圳市龙岗区疾病预防控制中心,广东深圳518172

出　　处：《中国卫生检验杂志》2011年第7期1661-1662,1665,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的:研究利用在线紫外过硫酸盐消解-流动注射分析方法测定水中总氮,用于地表水、地下水、生活污水和工业废水中总氮的测定,以实现自动化批量分析。方法:将总氮模块按流路图安装后,接入泵连接相应的溶剂,进行总氮的自动化检测。结果:总氮的检出限是0.018 mg/L,总氮在0 mg/L～10 mg/L范围内线性良好,相关系数在0.999以上,精密度和准确度高,精密度为1.5%,加标回收率在90.5%～106%。结论:建立了在线紫外过硫酸盐消解-流动注射分析方法测定水中总氮的方法,该方法检出限低,准确度和灵敏度高,适合大批量样品的检测。Objective：To research the determination of TN in water by On-line UV persulfate digestion and flow injection analysis and detect the total nitrogen in surface water,groundwater,sewage and industrial wastewater in order to realize automatic batch analysis.Methods： After total nitrogen module installed by flow circuit diagram,access the pump to connect appropriate solvent for the automated detection of TN.Results： The detection limit of TN by this method was 0.018 mg/L.The linear range of determination of TN was 0 mg/L～10 mg/L（r〉0.999）.The method had high precision and accuracy.RSD of 1.5% and the recoveries of 90.5%～106% were obtained.Conclusion： The method of determination of TN by On-line persulfate digestion and flow injection analysis is suitable for the detection of large numbers of samples,with low detection limit,high accuracy and sensitivity.

关 键 词：总氮 水质 流动注射法 

分 类 号：O657.32[理学—分析化学]