红外吸收法测生铁中碳及其不确定度的评定  

Evaluation of Uncertainty in the Determination of Carbon in Pig Iron by High Frequency Infrared Adsorption

作　　者：谭谦[1] 余卫华[1] 易丽红[1] 

机构地区：[1]武钢研究院检测试验研究所,湖北武汉430080

出　　处：《广州化工》2013年第19期106-108,共3页GuangZhou Chemical Industry

摘　　要：采用高频燃烧红外吸收法测定生铁中碳含量时,分别使用标准样品和基准物质校准碳的标准曲线,两种校准方法的测定结果一致,但精度略有差别。经过对影响测定结果不确定度的各个因素进行比较,发现不确定度的差异主要来源于测量重复性、标准样品碳含量、测量变动性和称量过程引起的不确定度分量。采用基准物质校准标准曲线的不确定度更小。t检验表明,两种校准方法的测定结果无显著性差异。According to standard curves which calibrated by either certificated reference materials or primary standard, the content of carbon in pig iron was determined by high frequency infrared absorption method. The results were slightly different in precision. The factors influencing the uncertainty of results were analyzed in both groups, and through the evaluation procedures of uncertainty, it could be concluded that the uncertainty of determination results was mainly from repeatability of determination, carbon content of certificated reference material, variability in determination and weighing. The value of relative standard uncertainty was smaller while the standard curve was calibrated by primary standard. There was no significant difference among the results in both groups through t -Test.

关 键 词：生铁 高频燃烧红外吸收法 不确定度 T检验 碳含量 

分 类 号：O659.2[理学—分析化学]