EDTA容量法测定硫酸铝中氧化铝含量不确定度评定  

Evaluation of Uncertainty in the Determination of Aluminum Oxide Content in Aluminum Sulfate Using EDTA Volumetric Method

作　　者：沈涵雅 Shen Hanya(Beijing Aoda Branch,Sinopec Catalyst Co.,Ltd.,Beijing 101111,China)

机构地区：[1]中国石化催化剂有限公司北京奥达分公司,北京101111

出　　处：《山西化工》2024年第3期49-51,55,共4页Shanxi Chemical Industry

摘　　要：对EDTA容量法测定硫酸铝中氧化铝含量的不确定度进行了评定,不确定度主要来源于EDTA标准溶液浓度、氯化锌标准滴定溶液浓度与玻璃容器的允差,氧化铝的摩尔质量和重复测定对不确定度影响较小。当氧化铝测定结果为93.8 g/L时,扩展不确定度为0.64 g/L(k=2)。The uncertainty in the determination of aluminum oxide content in aluminum sulfate by EDTA volumetric method was evaluated.The uncertainty mainly comes from the concentration of EDTA standard solution,the tolerance of zinc chloride standard titration solution and glass container.The molar mass of aluminum oxide and repeated measurements have little impact on the uncertainty.When the result of alumina determination is 93.8 g/L,the expanded uncertainty is 0.64 g/L(k=2).

关 键 词：不确定度评定 EDTA容量法 氧化铝含量 

分 类 号：O655.2[理学—分析化学]