适用于土壤重金属分析的前处理方法  

An optimal pretreatment method suited to the analysis of heavy metals

作　　者：黄金丽[1,2] 陕红[1,2] 刘福艳[3] 刘连志[1,2] 仝乘风[1,2] 汪聪慧[1,2] 

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,北京100081 [2]农业部旱作节水农业重点实验室,北京100081 [3]山东省食品药品检验所,济南250101

出　　处：《分析试验室》2013年第1期26-30,共5页Chinese Journal of Analysis Laboratory

基　　金：中央级公益性科研院所基本科研业务费专项资金(BSRF201007)资助

摘　　要：以4种环境土壤标准物质作为土壤测试品,并通过比较各种消解液和相应的消解装置,获得了各自ICP-MS的重金属含量数据。实验结果表明,最佳的土壤样品前处理方法如下,消解液:5 mL HNO3+1 mL HF;消解装置:电热板;反应条件:250℃恒温2 h;相对误差:1.14×10-2%～6.57%(As,Mn,Pb,Zn,Cu,Cr)。Selecting an appropriate pretreatment method for soil samples is the key to determine the contents of heavy metals accurately.We took four kinds of environmental soil standards as test samples,and through comparing various formulas of digestives and diverse digestion systems,their ICP-MS data of heavy metal content were obtain.The experimental results showed the optimal pretreatment method was as follows,digestives： 5 mL of HNO3 and 1 mL of HF;digesttion system： electric hot plate;digestion condition： kept in 250 ℃ for 2 hours;accuracy（relative error）： 1.14×10-2%-6.57%（As,Mn,Pb,Zn,Cu,Cr）.

关 键 词：土壤 重金属 ICP-MS 前处理 

分 类 号：O652.4[理学—分析化学]