4种铅矿石和铅精矿成分分析标准物质的研制

Development of Certified Reference Materials of Four Lead Ore and Lead Concentrate for Chemical Analysis

研制了铅矿石和铅精矿成分分析标准物质。从国内有代表性的矿区取4点,采用了多级破碎、三维机械混筛工艺,确保了该标准物质化学成分的均匀性,多家权威实验室用准确可靠的分析方法确定了1个铅矿石和3个铅精矿中15个元素成分的认定值和不确定度。经考察,该标准物质的均匀性与稳定性良好。该项目标准物质已被国家市场监督管理总局批准为国家级标准物质。

The certified reference materials of lead ore and lead concentrate for chemical analysis were developed.Samples were selected from four different representative mining area at home.Using the multi-stage crushing and three-dimensional mechanical mixing process,ensure the homogeneity of CRMs.The values and standard uncertainty of fifteen elements in CRMs of lead ore and lead concentrates have been determined by several authority lab using accurate analysis methods.After investigation,the homogeneity and stability of the CRMs are good.The CRMs have been approved as national CRMs by State Administration for Maeket Regulation of P.R.China.