消解体系对土壤重金属测定的影响

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英文篇名：EFFECT OF DIGESTION SYSTEMS ON DETERMINATION OF HEAVY METALS IN SOIL 作者：徐伊莎 ; 夏新 ; 李欣 ; 王静 ; 于雯 英文作者：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; 关键词：土壤 ; 重金属 ; 电感耦合等离子体质谱法 ; 湿法消解 英文关键词：soil;;heavy metals;;ICP-MS;;wet digestion method 中文刊名：环境工程 英文刊名：Environmental Engineering 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; 出版日期：2019-05-15 出版单位：环境工程 年：2019 期：05 基金：国家环境保护标准制修订项目(环办函[2017]09号) 语种：中文; 页：69-72+157 页数：5 CN：11-2097/X ISSN：1000-8942 分类号：X833

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。
        HNO_3-HCl-HF-HClO_4 digestion system( recommended by national standard method) and HF-HClO_4 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.

引文

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