离子色谱法测定地下水中4种无机阴离子的优化条件

Optimization Conditions for the Determination of Four Inorganic Anions in Groundwater by Ion Chromatography

离子色谱的色谱柱使用1-2年后,其柱效会明显降低,特别是F^(-)与Cl^(-)分离度减小,如何通过适当地调整色谱工作条件,来提高分离效能,以达到节约成本延长色谱柱使用时间非常有意义。本文对淋洗液浓度、淋洗液流速及保存时间进行条件试验,试验结果仪器精密度、准确度符合标准要求。并在优化条件下测定本地区2023年度地下水中F^(-)、Cl^(-)、NO_(3)^(-)、SO_(4)^(2-)等4种无机阴离子的含量,并结合2021-2022年检测结果,综合分析近3年来本地区地下水中无机阴离子的含量及变化趋势。

After 1-2 years of use,the column efficiency of ion chromatography will significantly decrease,especially the separation degree of F^(-)and Cl^(-).It is very meaningful to adjust the chromatographic working conditions appropriately to improve the separation efficiency and save costs by extending the service time of the chromatography column.This article conducts conditional tests on the concentration,flow rate,and storage time of the eluent,and the experimental results show that the precision and accuracy of the instrument meet the standard requirements.And under optimized conditions,the content of four inorganic anions,F^(-)、Cl^(-)、NO_(3)^(-)、SO_(4)^(2-),etc.,in the groundwater of the local area in 2023 was determined.Combined with the detection results from 2021-2022,the content and trend of inorganic anions in the groundwater of the local area in the past three years were comprehensively analyzed.