6种南方酸性土壤重金属元素氯化钙可提取态标准物质研制  

Development of six extractable certified reference materials of calcium chloride for analysis of heavy metals in southern acid soil

作　　者：陈宗定[1] 许春雪[1,2] 刘贵磊 安子怡[1,2] 王苏明[1] 王亚平 CHEN Zongding;XU Chunxue;LIU Guilei;AN Ziyi;WANG Suming;WANG Yaping(National Research Center for Geoanalysis,Beijing 100037,China;Key Laboratory of Eco-geochemistry,Ministry of Natural Resources,Beijing 100037,China)

机构地区：[1]国家地质实验测试中心,北京100037 [2]自然资源部生态地球化学重点实验室,北京100037

出　　处：《冶金分析》2021年第10期12-22,共11页Metallurgical Analysis

基　　金：地质调查标准化与标准制修订项目(2019—2021)(国家地质实验测试中心)(DD20190475);全国土壤污染状况详查项目(121201105000168509)。

摘　　要：土壤重金属元素可提取态可更好地反映土壤中重金属的环境效应和生态风险,在土壤污染调查和研究工作中受到广泛关注。实验以CaCl_(2)溶液作为提取剂,研制了6种南方酸性土壤重金属CaCl_(2)可提取态标准物质。样品分别采自江苏、安徽、福建和贵州,经干燥、研磨、过筛、混匀等步骤制备而成,检验评估结果表明样品均匀性和稳定性良好。由11家实验室采用多种不同原理分析方法协作定值,认定值为多家实验室测试结果的算术平均值,定值指标(参数)包括CaCl_(2)溶液提取的Cd、As、Pb、Cr、Cu、Ni、Zn、V、Mn、Co、Mo、Tl、Sb、Be元素可提取态及pH值。该系列标准物质适用于土壤可提取态分析中仪器校准、分析方法确认和评价、测量过程质量控制、技术能力考核及分析结果仲裁等技术工作。The extractable heavy metals in soil can better reflect the environmental effect and ecological risk of heavy metals in soil,and have been paid much attention in soil pollution survey and study.In experiments,CaCl_(2)solution was used as extractant to develop six extractable certified reference materials of calcium chloride for analysis of heavy metals in southern acid soil.The samples were collected in Jiangsu,Anhui,Fujian and Guizhou,and prepared through several steps including drying,grinding,screening,and mixing.The testing and evaluation results showed that the samples had good homogeneity and stability.The certified values were obtained by 11 laboratories using reliable methods with different principles.The certified values were arithmetic mean values of measurement results in laboratories.The certified indexes(parameters)included the extractable state of Cd,As,Pb,Cr,Cu,Ni,Zn,V,Mn,Co,Mo,Tl,Sb and Be extracted by CaCl_(2)solution as well as pH.The developed certified reference materials could be applicable for the instrument calibration in extractable state analysis of soil,recognition and evaluation of analysis method,quality control in measurement,technical capability test,and analysis result arbitration.

关 键 词：土壤 重金属 可提取态 标准物质 

分 类 号：O657[理学—分析化学]