吹扫捕集-气相色谱-冷原子荧光光谱法测定固废浸出液中烷基汞  

Determination of Alkyl Mercury Leaching Toxicity in Solid Waste by Purge and Trap/Gas Chromatography Cold Atomic Fluorescence Spectrometry

作　　者：杨琳玲 钱晓燕 朱庆云 沙贤亮 YANG Lin-ling;QIAN Xiao-yan;ZHU Qing-yun;SHA Xian-liang(Changxing County Environmental Protection Monitoring Station,Huzhou Zhejiang 313100,China;Changxing County Center for Disease Control and Prevention,Huzhou Zhejiang 313100,China)

机构地区：[1]长兴县环境保护监测站,浙江湖州313100 [2]长兴县疾病预防控制中心,浙江湖州313100

出　　处：《干旱环境监测》2024年第4期145-150,共6页Arid Environmental Monitoring

摘　　要：建立了吹扫捕集/气相色谱-原子荧光光谱仪测定固体废物浸出液中烷基汞的分析方法。固废样品经硫酸硝酸-翻转振荡法浸提,二氯甲烷/水萃取与反萃取,四丙基硼化钠衍生后,进入全自动烷基汞分析仪测定甲基汞和乙基汞。结果表明:甲基汞和乙基汞的检出限均为0.9 ng/L。空白样品的精密度分析,甲基汞和乙基汞的相对标准偏差分别为5.2%~8.4%,2.9%~6.2%。取固废实际样品准确度分析,甲基汞和乙基汞的加标回收率分别为84.0%~90.0%,81.0%~85.1%。该方法操作简单、检出限低、准确度高,适合大批量固体废物浸出液中烷基汞的测定。An analytical method for the use of purge trap/GC-atomic fluorescence spectrometer for the determination of alkyl mercury in solid waste extract was established.Solid waste samples by sulfate nitrate-flip oscillation method,methyl chloride/water extraction and reverse extraction,tetrapropyl sodium boride derivative,into the automatic alkyl mercury analyzer to determine methyl mercury and ethyl mercury.The results showed that the detection limit of both methyl mercury and ethyl mercury was 0.9 ng/L.Precision analysis of blank samples,the relative standard deviation of methyl mercury and ethyl mercury was 5.2%~8.4%and 2.9%~6.2%,respectively.According to the accuracy of solid waste,the recovery rate of methyl mercury and ethyl mercury was 84.0%~90.0%and 81.0%~85.1%respectively.This method is simple to operate,with low detection limit and high accuracy,and is suitable for the determination of alkyl mercury in large quantities of solid waste leaching solution.

关 键 词：吹扫捕集 气相色谱-冷原子荧光光谱法 烷基汞 固废浸出液 

分 类 号：X832[环境科学与工程—环境工程]