热分解-汞齐化富集-冷原子吸收分光光度法测定工业废盐中的汞含量  

Determination of Mercury Content in Industrial Waste Salt by Pyrogenic Decomposition-Amalgamation Enrichment-Cold Atom Absorption Spectrophotometry

作　　者：饶丽丽 李凡露 张晖 廖绍群 鞠颖 Rao Li-li;Li Fan-lu;Zhang Hui;Liao Shao-qun;Ju Ying(Jiangxi Nuclear Industry Environmental Protection Center Co.,Ltd.,Nanchang Jiangxi 330002,China;Experimental Testing Team of Jiangxi Geological Bureau,Nanchang Jiangxi 330002,China;Mineral Exploration lnstitute of Jiangxi geological survey and Exploration institute,Nanchang Jiangxi 330103,China;Jiangxi Jinyuan Nonferrous Metals and Geology Testing Co.,Ltd.,Nanchang Jiangxi 330201;Xinyu City Ecological and environmental Pollution Prevention and Control Center,Xinyu Jiangxi 338000,China)

机构地区：[1]江西核工业环境保护中心有限公司,江西南昌330002 [2]江西省地质局实验测试大队,江西南昌330002 [3]江西省地质调查勘查院矿产勘查所,江西南昌330103 [4]江西金源有色地质测试有限公司,江西南昌330201 [5]新余市生态环境污染防治中心,江西新余338000

出　　处：《江西化工》2024年第1期92-95,共4页Jiangxi Chemical Industry

基　　金：江西省地质局2023年度生态环境修复公益项目“典型图体废物污染溯源生态环境损害鉴定技术方法体系研究”(2023STXF04)。

摘　　要：本研究尝试建立利用热分解-汞齐化富集-冷原子吸收分光光度法测定工业废盐中汞含量的方法。本研究方法在进样量为0.1g,样品干燥温度为150℃,干燥时间为20s,热分解温度为750℃,分解时间为180s,汞齐化时间为12s,读数时间为30s的条件下用直接测汞仪检测工业废盐中的汞含量。实验结果显示,方法测定范围为0.001μg/g~5μg/g,相关系数R2优于0.9999,汞含量的检出限为0.0002μg/g,相对标准偏差(RSD)在6.34%~7.55%范围内,工业废盐样品加标回收率在89.8%~121.4%范围内。该方法操作简便、耗时较短、无基体干扰、重现性好、准确度高,适用于生态环境损害鉴定评估、固体废物鉴别等工作中工业废盐的汞含量测定。This study attempts to establish a method for determining mercury content in industrial waste salt using thermal decomposition mercury homogenization enrichment cold atomic absorption spectrophotometry.This research method uses a direct mercury analyzer to detect the mercury content in industrial waste salt under the conditions of a sample injection volume of 0.1 g,sample drying temperature of 150℃,drying time of 20 seconds,thermal decomposition temperature of 750℃,decomposition time of 180 seconds,mercury homogenization time of 12 seconds,and reading time of 30 seconds.The experimental results show that the measurement range of the method is 0.001μg/g~5μg/g,correlation coefficient R2 better than 0.9999,detection limit of mercury content is 0.0002μg/g,the relative standard deviation(RSD)is within the range of 6.34%to 7.55%,and the recovery rate of industrial waste salt samples is within the range of 89.8%to 121.4%.This method is easy to operate,time-consuming,matrix free,reproducible,and highly accurate,and is suitable for the determination of mercury content in industrial waste salts in ecological environment damage assessment,solid waste identification,and other work.

关 键 词：热分解-汞齐化富集-冷原子吸收分光光度法 工业废盐 汞 生态环境损害鉴定评估 危险废物鉴别 

分 类 号：O657.31[理学—分析化学] X833[理学—化学]