土壤重金属元素的前处理技术初探——微波消解-ICP-MS法  

Preliminary Study on Pretreatment Technology of Heavy Metal Elements in Soil with the Method of Microwave Digestion and ICP-MS

作　　者：徐悦[1] XU Yue(Lianyungang Agricultural Products Quality Supervision,Inspection and Test Center,Lianyungang 222001,China)

机构地区：[1]连云港市农产品质量监督检验测试中心,江苏连云港222001

出　　处：《蔬菜》2021年第12期16-21,共6页Vegetables

摘　　要：为防治土壤重金属污染,维持生态平衡,保护人体健康,探寻简便、快捷、准确、定量分析土壤重金属元素含量的方法,利用微波消解-ICP-MS法对土壤标准样品中7种重金属元素(Cr、Cu、Zn、As、Cd、Pb和Hg)的前处理技术进行研究,结果表明:不同的硝酸+氢氟酸体系在分析不同土壤标准样品中的7种重金属元素时,用法、用量不尽相同;土壤标准样品ESS-7a在硝酸+氢氟酸(预消解6+3,二次消解3+0,mL)和土壤标准样品ESS-8a在硝酸+氢氟酸(预消解5+2,二次消解3+0,mL)加酸体系下的测定结果与标准值基本符合;这2种方法用酸量少,简便快捷,环境污染少,准确度和精密度都较高,因此可以作为同时测定这7种元素的前处理方法。In order to prevent and control of soil pollution with heavy metal elements,maintain ecological balance and protect human health,a simple,rapid,accurate and quantitative analysis method of soil heavy metal contents was explored.The pretreatment technology of seven heavy metal elements(Cr,Cu,Zn,As,Cd,Pb and Hg)in soil standard samples by the method of microwave digestion and ICP-MS was studied.The results showed that in the analysis of seven heavy metal elements in different soil standard samples,the usage and dosage of nitric acid+hydrofluoric acid systems were different.The determination results of soil standard sample ESS-7a in nitric acid+hydrofl uoric acid(6 mL+3 mL in predigestion,3 mL+0 mL in redigestion)and soil standard sample ESS-8a in nitric acid+hydrofl uoric acid(5 mL+2 mL in predigestion,3 mL+0 mL in redigestion)systems were basically consistent with the standard values.These two methods were using less acid,simple and quick,less environmental pollution,high accuracy and precision,so they could be used as pretreatment methods for simultaneous determination of these seven elements.

关 键 词：微波消解 土壤 重金属 测定 前处理 

分 类 号：X833[环境科学与工程—环境工程]