火花源原子发射光谱法测定铸铁中碳的不确定度评定  

Evaluation of the uncertainty for measurement of carbon in cast iron by spark source atomic emission spectrometry

作　　者：马天菊 

机构地区：[1]中国南车集团资阳机车有限公司铸造分公司,四川资阳641301

出　　处：《冶金分析》2007年第9期79-82,共4页Metallurgical Analysis

摘　　要：对火花源原子发射光谱法测定铸铁中碳含量的不确定度产生原因进行了分析,根据最小二乘法原理拟合工作曲线,确定了二元线性回归拟合引入的标准不确定度,并对一个铸铁样品中碳含量测定结果的不确定度进行了评定。The source of the uncertainty for the measurement of carbon in cast iron by spark source atomic emission spectrometry was discussed. A calibration curve was fitted by using the least square method and the standard uncertainty from dualistic linear regression fitting was confirmed. Moreover, the uncertainty of the measurement of carbon in a cast iron sample was evaluated.

关 键 词：火花源原子发射光谱仪 最小二乘法 不确定度 碳 铸铁 评定 

分 类 号：TG115.33[金属学及工艺—物理冶金]