Comparison of pretreatment methods for the determination of water-soluble anions in atmospheric particulates by ion chromatography
离子色谱法测定大气颗粒物中水溶性阴离子的前处理方法比较

摘要

离子色谱法广泛用于大气颗粒物中水溶性阴离子的分析，因其具有高灵敏度和分离效果良好的特点。为了提高测定精度和降低干扰，预处理方法的选择尤为关键。本研究对比了几种常用的前处理方法，包括过滤法、酸解法和离子交换法等，评估其在样品处理中对水溶性阴离子的提取效率、干扰控制和分析结果的影响。结果表明，酸解法在样品前处理中的效果最佳，能够有效去除非目标物质，减少背景干扰，获得准确可靠的数据。本文通过对比实验，探讨了不同前处理方法在大气颗粒物分析中的适用性，为后续的环境监测工作提供了理论依据。

Abstract

Ion chromatography is widely used in the analysis of water-soluble anions in atmospheric particulates due to its high sensitivity and excellent separation performance. To improve the determination accuracy and reduce interference, the selection of pretreatment methods is particularly crucial. This study compared several commonly used pretreatment methods, including filtration, acid hydrolysis, and ion exchange, evaluating their effects on the extraction efficiency of water-soluble anions, interference control, and analytical results during sample processing. The results showed that acid hydrolysis had the best performance in sample pretreatment, as it could effectively remove non-target substances, reduce background interference, and obtain accurate and reliable data. Through comparative experiments, this paper discussed the applicability of different pretreatment methods in the analysis of atmospheric particulates, providing a theoretical basis for subsequent environmental monitoring work.