流动注射在线分析法测定水源水中亚硝酸盐氮  

Determination of Nitrite Nitrogen in Source Water by Online Flow Injection Analysis

作　　者：贺舒文 HE Shu-Wen(Liaoning Tongzheng testing Co.,LTD,Shenyang 110025)

机构地区：[1]辽宁通正检测有限公司,沈阳110025

出　　处：《中国口岸科学技术》2024年第5期87-90,共4页China Port Science and Technology

基　　金：大连市科技创新基金(2019J13SN122)。

摘　　要：本文拟建立流动注射在线分析法测定水源水中亚硝酸盐氮含量的方法。实验样品中的亚硝酸盐通过N-(1-萘基)-乙二胺盐酸盐与磺胺发生重氮反应,生成可溶于水的紫红色化合物,在波长520 nm处检测,发现水源水中的亚硝酸盐氮含量与吸光度成正比。水源水中亚硝酸盐氮在0.000~10.0 mg/L范围内线性关系良好,相关系数大于0.999,检出限为0.005 mg/L,测定下限为0.010 mg/L,加标回收率为90.0%~103%,相对标准偏差为1.21%~7.61%。结果表明,该方法操作方便,具有较好的重复性和准确度,能够满足水源水检测的相关要求。This paper intends to establish a method for the determination of nitrite nitrogen content in source water using flow injection on-line analysis.In the experiment,nitrite in the sample underwent diazo reaction with sulfamide through N-(1-naphthyl)-ethylenediamine hydrochloride to produce a purple-red compound soluble in water.The detection at a wavelength of 520 nm revealed that the nitrite nitrogen content in the source water was proportional to absorbance.The linear relationship of nitrite nitrogen in source water was good within the range of 0.000-10.0 mg/L,with the correlation coefficient greater than 0.999.The detection limit was 0.005 mg/L,and the determination limit was 0.010 mg/L,with a standard recovery rate of 90.0%-103%and a relative standard deviation of 1.21%-7.61%.The method is easy to operate,exhibits good repeatability and accuracy,and meets relevant requirements for source waterdetection.

关 键 词：流动注射 水源水 亚硝酸盐氮 

分 类 号：X832[环境科学与工程—环境工程]