摘要
文中对比研究了离子色谱法和光度法测定农村井水中硝酸盐氮和亚硝酸盐氮。离子色谱法和光度法测定硝酸盐氮的检出限、精密度、加标回收率分别为0.014 mg/L、1.4%~4.9%、94%~106%和0.030 mg/L、1.6%~6.7%、98%~105%;离子色谱法和光度法测定亚硝酸盐氮的检出限、精密度、加标回收率分别为0.002 mg/L、1.4%~4.4%、90%~102%和0.004 mg/L、0.7%~3.6%、92%~104%。试验结果表明,离子色谱法的检出限低,而两种方法的精密度、准确度、t值检验无显著性差异,两种方法均满足日常监测要求。离子色谱法具有样品前处理过程简单,测定过程快速且可实现多种离子同时检测等优点,更利于对井水水质的检测分析。
Ion chromatography and spectrophotometry determination of nitrate nitrogen and nitrite nitrogen in well water were compared in detail in the paper.Detection limits,precision and recoveries of nitrate nitrogen were 0.014 mg/L,1.4%~4.9%,94%~106%for ion chromatography and 0.030 mg/L,1.6%~6.7%,98%~105%for spectrophotometry.Besides,detection limits,precision and recoveries of nitrite nitrogen were 0.002 mg/L,1.4%~4.4%,90%~102%for ion chromatography and 0.004 mg/L,0.7%~3.6%,92%~104%for spectrophotometry.Results showed detection limit of ion chromatography was lower,while there was no significant difference in the results.Both methods could meet daily monitoring requirements.Ion chromatography was a better method to the detection and analysis of well water due to its advantages of simple,fast and simultaneous detection of several ions.
作者
魏国芬
WEI Guofen(Xiangyang Environmental Protection Monitoring Station,Xiangyang 441000,China)
出处
《净水技术》
CAS
2020年第4期19-22,73,共5页
Water Purification Technology
关键词
硝酸盐氮
亚硝酸盐氮
离子色谱法
分光光度法
井水水质监测
nitrate nitrogen
nitrite nitrogen
ion chromatography
spectrophotometry
well water quality monitoring
