离子色谱法测定环境水中阴离子

THE METHOD RESEARCH TO DETERMINE ANIONS IN ENVIRONMENTAL WATER SAMPLES WITH ION CHROMATOGRAPHY

摘要: 建立了测定环境水中阴离子的方法.以1.8 mmol/L Na₂CO₃和1.7 mmol/L NaHCO₃为淋洗液,36 mmol/L的H₂SO₄为微膜抑制器的再生液,用Pac AS-14A阴离子分离柱,一次进样10 μL,8 min内检测出7种阴离子.详细讨论了色谱的工作条件及其影响因素.该方法简便、快速、准确度高,能够满足环境水样中阴离子的分析要求.

Abstract: In the analysis for anions in environmental water with ion chromatography (IC), the drip washing liquid with 1.8 mmol/L Na₂HCO₃ and 1.7 mmol/L NaHCO₃ is adopted. The regenerative liquid is 36 mmol/L H₂SO₄. The system is composed of series chromatography of PacAs-14 and conductivity detector. For 10 μL sample, within 8 min, seven kinds of anions can be detected. The working condition and the affecting factors of IC is discussed. Its relative standard deviation is between 1.9% and 6.0%, with a recovery above 97%. The method is practical, rapid and reliable. It can completely meet the demand of the analysis for anion in environmental water samples.