离子色谱法应用于杭州地表水中有机酸及无机阴离子分布研究

建立了离子色谱-抑制电导法同时检测杭州市地表水中的有机酸及无机阴离子,并对地表水中有机酸及无机阴离子的含量进行探讨.该方法的重现性(RSD)为0.15％ ～4.92％,相关系数r2为0.9990 ～ 0.9999,加标回收率为84.36％～111.05％,最低检出限为0.003～0.028 mg/L.利用该建立的方法,...

Study on the Distribution of Organic Acids and Inorganic Anions in Surface Water in Hangzhou by Ion Chromatography

An ion chromatography with inhibition conductance method was established for simultaneous determination of organic acids and inorganic anions in Hangzhou surface water.And the content of organic acids and inorganic anions in surface water were discussed.The repeatability of the method(RSD)is 0.15%~4.92%,the correlation coefficient r² is 0.9990~0.9999,the standard addition recovery is 84.36%~111.05%,and the lowest detection limit is 0.003~0.028 mg/L.Using the establishedmethod,the contents of 4 kinds of organic acids and 7 kinds of inorganic anions were determined.The analysis results show that the inorganic anions in Hangzhou city surface water are mainly SO₄^3-,Cl^-,NO₃^-,which mainly come from vehicle exhaust and industrial waste water,etc.Organic acids are mainly formic acid and acetic acid,which mainly come from automobile exhaust and direct emissions from chemical plants.Due to the difference of terrain and other conditions,the concentrations of organic acids and inorganic anions in the surface water in different areas of Hangzhou are different,and the detection values are quite different.