三节炉法测定煤中碳和氢含量的不确定度评定

Evaluation on the Uncertainty of Experimental Results of Carbon and Hydrogen Content in Coal by Three Section Furnace Method

根据GB/T 476-2008《煤中碳和氢的测定方法》[1],按照JJF1059.1-2012《测量不确定度评定与表示》[2],对三节炉法测定煤中碳和氢含量测定结果不确定度的来源进行了分析,并对各标准不确定度分量进行识别和计算,得出合成标准不确定度,最终确定扩展不确定度和不确定度报告。评定结果表明:取包含因子k=2时,空气干燥基碳和干燥基碳的扩展不确定度为:0.05%,空气干燥基氢和干燥基氢的扩展不确定度为:0.06%。

Based on GB/T 476-2008 Determination of Carbon and Hydrogen in Coal[1]and JJF1059.1-2012 Evaluation and Representation of Measurement Uncertainty[2],the uncertainty components in the determination process of carbon and hydrogen content in coal by three section furnace method were identified and calculated.Then the combined standard uncertainty was achieved.At last,the expand uncertainty and uncertainty report was determined.The evaluation results showed that the expanded uncertainty of air dried carbon and dry carbon was 0.05%,and that of air dried hydrogen and dry hydrogen was 0.06%.