加速溶剂萃取-离子色谱法测定PM_(2.5)中5种水溶性阴离子  

Determination of five water-soluble anions in PM_(2.5) by accelerated solvent extraction-ion chromatography

作　　者：陈锦超 张婉 魏沙沙 饶梦囡 冯甜甜 董雪玲 CHEN Jin-chao;ZHANG Wan;WEI Sha-sha;RAO Meng-nan;FENG Tian-tian;DONG Xue-ling(School of Science,China University of Geosciences,Beijing 100083;Guobiao (Beijing) Testing and Certification Co.,Ltd,Beijing 100088)

机构地区：[1]中国地质大学(北京)数理学院,北京100083 [2]国标(北京)检验认证有限公司,北京100088

出　　处：《分析试验室》2019年第2期131-135,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金资助项目(411050116);中央高校基本科研业务费专项资金项目(2652015332)资助

摘　　要：建立了一种加速溶剂萃取(ASE)-离子色谱(IC)法测定PM_(2.5)样品中5种水溶性阴离子(F^-,Cl^-,NO_2^-,NO_3^-和SO_4^(2-))的分析方法。以水为萃取剂,采用加速溶剂萃取仪对PM_(2.5)滤膜样品进行萃取,萃取后经离子色谱仪检测,外标法定量,并对色谱条件和萃取条件进行优化。5种水溶性阴离子在5～40 mg/L范围内线性关系良好,相关系数(R)均大于0. 999,检出限(LOD)在0. 005～0. 015 mg/L之间,加标回收率在94. 7%～105. 6%范围内,相对标准偏差(n=6)均小于5%。该方法可用于PM_(2.5)样品中水溶性阴离子的定量分析。A method has been developed for efficient extraction and determination of five water-soluble anions (F^-,CI^-,NO2^-,NO3^- and SO4^2-)in PM2.5 by accelerated solvent extraction (ASE)-ion chromatography (IC).PM2.5 samples were extracted using ASE with water,and then analyzed by IC, using external standard method for quantification.The conditions of chromatography and extraction were optimized as well.The calibration curves for five water-soluble anions were linear in the range of 5~40 mg/L with correlation coefficients all greater than 0.999.The detection limits were between 0.005 mg/L and 0.015 mg/L,the spiked recoveries were in-the range of 94.7% to 105.6% and the relative standard deviations (n =6) were all less than 5 %.The result showed that the method can be used for the determination of water-soluble anions in PM2.5.

关 键 词：加速溶剂萃取 离子色谱 PM2.5 阴离子 

分 类 号：X823[环境科学与工程—环境工程] O657.7[理学—分析化学]