高浓度六价铬溶液标准物质制备  

Preparation of reference material for high concentration hexavalent chromium solution

作　　者：王琳琳 刘媛媛 管其红 黄清波 朱建强 郭波 WANG Linlin;LIU Yuanyuan;GUAN Qihong;HUANG Qingbo;ZHU Jianqiang;GUO Bo(Shandong Institute of Metrology,Jinan 250102)

机构地区：[1]山东省计量科学研究院,济南250102

出　　处：《化学分析计量》2025年第1期1-5,共5页Chemical Analysis And Meterage

摘　　要：研制高浓度六价铬溶液标准物质。以重铬酸钾纯度标准物质为原料,以1%硝酸溶液为溶剂,采用重量-容量法制备质量浓度为100μg/mL的水中六价铬溶液标准物质,利用紫外可见分光光度计直接测定水中高浓度六价铬的方法对标准物质进行均匀性、稳定性检验及量值核验。F-检验和回归曲线结果表明,研制的标准物质具有良好的均匀性和稳定性;比对验证结果表明,其准确度与国家二级标准物质一致。该标准物质可为环境检测等领域六价铬检测数据的准确、可靠和互认提供保障。Development of high concentration hexavalent chromium solution reference material.Potassium dichromate purity reference material was used as raw material,and 1% nitric acid as solvent,the reference material of hexavalent chromium solution in water with the mass concentration of 100μg/mL was prepared by weight-volume method.The prepared reference material was directly determined by ultraviolet-visible spectrophotometry without dilution,and the uniformity,stability and quantity verification were carried out.The F-test and regression curve results show that the developed reference material had good uniformity and stability,and the comparative verification results show that its accuracy was consistent with the national secondary standard substance.The reference material can provide assurance for the accuracy,reliability,and mutual recognition of hexavalent chromium detection data in fields such as environmental test.

关 键 词：高浓度六价铬 紫外可见分光光度法 标准物质 不确定度 

分 类 号：O652[理学—分析化学]