抑制型电导-离子色谱法测定水中无机阴离子

Determination of Inorganic Anions in Water by Ion Chromatography with Suppressed Conductivity Detector

采用抑制型电导-离子色谱法测定生活饮用水、污水和地表水中F-、Cl-、NO2-、Br-、NO3-、PO43-、SO42-等7种无机阴离子,对清洁水样过滤后直接测定,浑浊样品离心后取上清液过滤测定。F-在0.100 mg/L^1.20 mg/L范围内、其余6种阴离子在1.00 mg/L^12.0 mg/L范围内线性良好,方法检出限为0.031 mg/L^0.47 mg/L,水样平行测定的RSD为0.9%~1.8%,加标回收率为82.6%~110%。

Seven inorganic anions was determined by ion chromatography with suppressed conductivity detector including F-,Cl-,NO-2,Br-,NO-3,PO3-4 and SO2-4 in drinking water,sewage and surface water.Filtered clean water samples were directly tested but samples which contained suspended solid materials should be centrifuged and filtered for the test.Results showed good linearity for F-ranging from 0.100 mg/L to 1.20 mg/L,for the other six inorganic anions ranging from 1.00 mg/L to 12.0 mg/L;detection limits of the method between 0.031 mg/L and 0.47 mg/L;sample RSD by parallel tests between 0.9% and 1.8%;and average recoveries between 82.6% and 110%.