Development of six extractable certified reference materials of calcium chloride for analysis of heavy metals in southern acid soil
CHEN Zongding1, XU Chunxue1,2, LIU Guilei1, AN Ziyi1,2, WANG Suming1, WANG Yaping1
1. National Research Center for Geoanalysis, Beijing 100037,China; 2. Key Laboratory of Eco-geochemistry, Ministry of Natural Resources, Beijing 100037, China
Abstract：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, CaCl2 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 CaCl2 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.
陈宗定, 许春雪, 刘贵磊, 安子怡, 王苏明, 王亚平. 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[J]. 冶金分析, 2021, 41(10): 12-22.
CHEN Zongding, XU Chunxue, LIU Guilei, AN Ziyi, WANG Suming, WANG Yaping. Development of six extractable certified reference materials of calcium chloride for analysis of heavy metals in southern acid soil. , 2021, 41(10): 12-22.
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