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土壤重金属含量测定不同消解方法比较研究
引用本文:龙加洪,谭菊,吴银菊,朱奕,许雄飞.土壤重金属含量测定不同消解方法比较研究[J].中国环境监测,2013,29(1):123-126.
作者姓名:龙加洪  谭菊  吴银菊  朱奕  许雄飞
作者单位:长沙市环境监测中心站,湖南长沙,410001
摘    要:消解是影响土壤重金属测定结果准确性的关键步骤.比较电热板消解、微波消解和全自动石墨消解3种消解方法的操作流程,同时对不同类型土壤样品中Cu、Zn、Pb、Cd、Cr、Ni 6种元素含量进行对比测定,结果表明,电热板消解设备简单,但步骤繁锁,操作不当易造成组分损失;微波消解速度快,测定结果精密性和准确性较好,但仍需人工赶酸程序且罐位少,不适合大批量样品分析;全自动石墨消解不仅测定结果精密性和准确性较好,而且自动化程度高,可实现无人值守,大大节省人力,尤其适合大批量样品的分析.

关 键 词:电热板消解  微波消解  全自动石墨消解  土壤  重金属
收稿时间:2011/11/24 0:00:00
修稿时间:2012/1/24 0:00:00

A Comparative Study on the Detection of Heavy Metal in Soil with Different Digestion Methods
LONG Jia-hong,TAN Ju,WU Yin-ju,ZHU Yi and XU Xiong-fei.A Comparative Study on the Detection of Heavy Metal in Soil with Different Digestion Methods[J].Environmental Monitoring in China,2013,29(1):123-126.
Authors:LONG Jia-hong  TAN Ju  WU Yin-ju  ZHU Yi and XU Xiong-fei
Institution:Changsha Environmental Monitoring Centre,Changsha 410001,China;Changsha Environmental Monitoring Centre,Changsha 410001,China;Changsha Environmental Monitoring Centre,Changsha 410001,China;Changsha Environmental Monitoring Centre,Changsha 410001,China;Changsha Environmental Monitoring Centre,Changsha 410001,China
Abstract:Digestion method is the key step to affect the results accuracy of detection of heavy metal in soil. Comparing operating procedures of electricity-plate digestion, microwave digestion and automated sample digestion, while detecting Cu,Zn,Pb,Cd,Cr and Ni in different soil samples with three digestion methods, results show that the instruments of electricity-plate digestion is simple, but the complicated operating procedures make the components in soil lost. Microwave digestion is rapid and accurate, but this method is not suitable for determination of a large number soil samples due to few row of the instrument and dispelling the acid by operator. Automated sample digestion is convenient, precise, accurate and highly automated for determination of a large number soil samples.
Keywords:electricity-plate digestion  microwave digestion  Automatic graphite dissolves  soil  heavy metal
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