Abstract：The uncertainty source for the determination of nitrogen in steel by inert gas fusion thermal conductivity method was detailedly analyzedThe main uncertainty components in determination process (sample weighing, certified reference material, measurement repeatability, instrumental resolution ratio and calibration) were reasonably evaluatedThe expanded uncertainty of measurement results was obtained through multiplying the combined standard uncertainty by 2 (expanded factor under confidence probability of 95 %).During the evaluation process of uncertainty, it was found that the certified reference material and measurement repeatability had the highest influence on the combined standard uncertaintyTherefore, the selection of proper standard sample curve calibration should be paid much attention in measurement, and the results should be calculated after repeated determination.
何志明;王锦玲;陈军. 惰性气体熔融热导法测定钢中氮量的不确定度评定[J]. 冶金分析, 2011, 31(1): 78-80.
HE Zhi ming;WANG Jin ling;CHEN Jun. Uncertainty evaluation for the determination of nitrogen in steel by inert gas fusion thermal conductivity method. , 2011, 31(1): 78-80.
