三氯化钛—重铬酸钾容量法测定硫铁矿和硫精矿中全铁含量的测量不确定度评定  

Evaluation of the Uncertainty of Determination of Total Iron Content in Pyrites and Concentrate by Titanium Trichloride Potassium Dichromate Volumetric Method

作　　者：杨小庆 丁信明 马秀华 

机构地区：[1]广东云浮硫铁矿企业集团公司计量检测中心,广东云浮527300

出　　处：《广东化工》2009年第7期210-212,233,共4页Guangdong Chemical Industry

摘　　要：在文章中,对三氯化钛—重铬酸钾容量法测定硫铁矿和硫精矿中全铁的不确定度进行了评定,分析了测量不确定度的来源,包括仪器的不确定度、标准物质纯度的不确定度、试样称量的不确定度和测量重复性的不确定度等。通过评定,当硫铁矿和硫精矿中全铁含量为42.06%时,测量结果的扩展不确定度为0.24%。The uncertainty of determination of total iron content in pyrite and concentrate by titanium trichloride potassium dischromate volumetric method was evaluated. The main sources of uncertainty were analyzed, which included the precision of the instrument, the purity of the standard material, the weight of the sample, the measurement repeatability and so on. When the total iron content was 42.06 %, the expanded uncertainty was 0.24 %.

关 键 词：不确定度 硫铁矿 全铁 三氯化钛—重铬酸钾容量法 评定 

分 类 号：TB[一般工业技术]