示差扫描量热计示值误差测量不确定度评定  

Evaluation of uncertainty in the measurement of indication error of differential scanning calorimeter

作　　者：戴宝峰 Dai Baofeng(Institute of Metrology of Hebei Province,Shijiazhuang 050200,China)

机构地区：[1]河北省计量监督检测研究院,石家庄050200

出　　处：《化学分析计量》2021年第5期85-88,共4页Chemical Analysis And Meterage

摘　　要：采用示差扫描量热(DSC)法测定热分析标准物质的熔化温度和熔化热,对示值误差的测量不确定度进行评定。建立示值误差的测量模型,分析不确定度来源,计算各不确定度分量,最终合成标准不确定度和扩展不确定度。铟、锌的温度示值误差的扩展不确定度分别为0.34、0.62℃(k=2),热量示值误差的相对扩展不确定度均为1.2%(k=2)。测量重复性引入的不确定度对测量结果影响最大。The melting temperature and heat of reference materials for thermal analysis were determined by differential scanning calorimetry(DSC),and the measurement uncertainty of indication error was evaluated.The measurement model of indication error was established,the source of uncertainty was analyzed,each uncertainty component was calculated,and finally the standard uncertainty and expanded uncertainty were synthesized.The expanded uncertainty of indium and zinc temperature indication error was 0.34,0.62℃(k=2),respectively,and the relative expanded uncertainty of heat indication error was 1.2%(k=2).The uncertainty introduced by measurement repeatability has the greatest influence on the determination results.

关 键 词：示差扫描量热法 示值误差 不确定度 

分 类 号：O657.9[理学—分析化学]