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消解体系对土壤重金属测定的影响

EFFECT OF DIGESTION SYSTEMS ON DETERMINATION OF HEAVY METALS IN SOIL

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【作者】 徐伊莎夏新李欣王静于雯

【Author】 XU Yi-sha;XIA Xin;LI Xin;WANG Jing;YU Wen;College of Energy and Environmental Engineering,University of Science and Technology Beijing;China National Environmental Monitoring Centre;Shenyang Environmental Monitor Center;Tianjin Eco-environmental Monitoring Centre;Ganzhou Environmental Monitor Center;

【通讯作者】 夏新;

【机构】 北京科技大学能源与环境工程学院中国环境监测总站沈阳市环境监测中心天津市生态环境监测中心赣州市环境监测站

【摘要】 采用全自动消解仪,选用硝酸-盐酸-氢氟酸-高氯酸消解体系(国标法)和氢氟酸-高氯酸消解体系(两酸法),对5种国家土壤标准物质和5种实际土壤样品进行消解,使用电感耦合等离子体质谱法(ICP-MS)测定Cu、Pb、Zn、Cr、Cd、Ni 6种目标元素。结果表明:5种标准物质中Cu、Zn、Cd和Ni的2种酸体系消解方法的回收率为90%~105%,Pb和Cr国标法的回收率均明显高于两酸法。5种实际土壤样品的2种消解方法精密度均较好,Cu、Cd和Ni含量无显著性差异,Cr含量有显著性影响,实际土壤样品中四川红壤的Pb、Zn含量有显著性影响。

【Abstract】 HNO3-HCl-HF-HClO4 digestion system( recommended by national standard method) and HF-HClO4 digestion system( two-acid method) were selected to digest five kinds of national standard soil materials and five kinds of actual samples by a full-automatic digestion instrument,and Cu,Pb,Zn,Cr,Cd and Ni target elements were determined by inductively coupled plasma mass spectrometry( ICP-MS). It was shown that the recovery rate for Cu,Zn,Cd and Ni among five standard materials by the both digestion systems reached 90% ~ 105%. The recovery rate of Pb and Cr by the national standard method was obviously higher than that by the two-acid method. The two digestion methods for five actual soil samples showed good precision degree. There was no significant difference in the content of Cu,Cd and Ni,a significant influence on the content of Cr was indicated,and the content of Pb and Zn of actual soil sample-3( red soil from Sichuan) was significantly influenced.

【基金】 国家环境保护标准制修订项目(环办函[2017]09号)
  • 【文献出处】 环境工程 ,Environmental Engineering , 编辑部邮箱 ,2019年05期
  • 【分类号】X833
  • 【被引频次】6
  • 【下载频次】263
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