摘要
采用在线镉柱还原-流动注射分析法同时测定水中的硝酸盐氮和亚硝酸盐氮。其中硝酸盐氮的方法线性范围为20.0-2000.0μg/L,相关系数r≥0.999,检出限为1.1μg/L,相对标准偏差为0.97%,样品测定频率为22样/小时,实际水样的加标回收率为94%-106%。亚硝酸盐氮的方法线性范围为2.0-200.0μg/L,相关系数r≥0.999,检出限为0.4μg/L,相对标准偏差为0.35%,样品测定频率为27样/小时,实际水样的加标回收率为91%-109%。此方法简单快捷,对于实际水样的测定结果令人满意。
Using flow iniection analysis method to determine nitrate and nitrite in waters. The liner range of nitrate was 20.0-2000.0μ g/L （r≥0.999）. The detection limit of nitrate was 1.1 μg/L. The relative standard deviation was 0.97% and the sample throughput of nitrate was 22samples/h. The recovery of nitrate was 94%-106%. The liner range of nitrite was 2.0-200.0 μ g/L （r≥0.999）. The detection limit of nitrate was 0.4 μg/L. The relative standard deviation was 0.35% and the sample throughput of nitrate was 27samples/ h. The recovery of nitrate was 91%-109%. The method was simple, rapid and has been used to the determination of nitrate and nitrite in water samples with satisfactory results.
出处
《生命科学仪器》
2007年第6期19-22,共4页
Life Science Instruments
基金
国家科技部"十五"科技攻关项目(编号:2004BA210A05)
