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《Environmental Science & Technology》 2013-S1
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Simultaneous Determination of Five Inorganic Anions in Drinking Water by Ion Chromatography

FU Sheng-hui(Banan Environmental Monitoring Central Station,Chongqing 401320,China)  
A method for the simultaneous determination of five inorganic anions(F-、Cl-、SO42-、NO3-、NO2-) in drinking water by ion chromatograghy using directconductivity detection is proposed.Chromatographic separation of common inorganic anions in drinking water on a IonPac AS11(4 mm×250 mm) anion exchange column.KOH is used as eluent.The effects of the types of eluent concentration,flow rate and column temperature on separation and retention time of the anions are investigated.The optimized chromatographic conditions for the separation and determination of five inorganic anions are as follows: 23.0 mmol/L KOH as the eluent,a flow rate of 1.2 mL/min and column temperature of 31.0 ℃.There relative standard deviations(RSD) of the concentrationare as for five anions are from 0.14% to 1.78%(n=4),the relative error are between 0.72% and 3.17%,and the recoveries are between 97.5% and 105.0%.A sample can be analyzed within 9 min.The method is simple and rapid.The results are accurate and reliable.The method is applied to determinate inorganic anions in drinking water.The results are satisfactory.
【CateGory Index】: O657.75;R123.1
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