离子色谱法测定饮用水中的8种阴离子

Detection of Eight Anions in Water by Ion-chromatography

摘要:

利用MIC型离子色谱仪，对饮用水中F-、Cl-、NO2-、NO3-、PO43-和SO42-阴离子进行检测。采用Supp 5~4.0 mm*150 mm离子色谱柱，3.2 mol/L碳酸钠和1.0 mol/L碳酸氢钠淋洗液，抑制型电导检测。结果表明，利用这个离子色谱的最佳条件可以对饮用水中的8种阴离子同时准确快速地定性定量检测。F-、HCOO-、Cl-、NO2-、Br-、NO3-、PO43-和SO42-的相对标准偏差为：1.588%~3.270%，检出限为：0.012 mg/L~5.076 mg/L，回收率为：94.0%~105.2%。实验结果发现有水样中的F-含量超出国家标准。

Abstract:

8 kinds of drinking water were measured with the MIC ion chromatography. The chromatography conditions were used as follows: Supp 5~4.0 mm*150 mm anion column, effluent of 3.2 mol/L sodium carbonate and 1.0 mol/L sodium bicarbonate and suppressed conductivity detection. The contents of F-, HCOO-, Cl-, NO2-, Br-, NO3-, PO43- and SO42- in drinking water were determined by ion chromatography（IC）. This method can determine the contents of eight kind of anions aqueous sample quickly and accurately. The relative standard deviations of the above eight kind of anions were 1.588%~3.270%, and the detection limits were 0.012 mg/L~5.076 mg/L while the percent recovery were 94.0%~105.2%. The results showed that the F- content of one mineral water sample exceeded the limit of the national standards.