称样量对红外-热导联合法测量结果的影响 -

为了将红外-热导联合法更有效地应用于煤质检测,通过试验及对数据精密度和准确度的统计分析,深入研究了煤样称样量对红外-热导联合法测量结果的影响。结果表明,C,H测量值随称样量的增加而降低,N测量值基本不随称样量变化,当称样量为70～90 mg时,C,H,N元素测量结果的准确度和精密度均符合要求。 In order to get more accurate results of coal quality which is tested by infrared-thermoconductive method,statistically analyze the precision and accuracy of the results,find that sample weight greatly influences the measurement results.The results show that the measured values of C and H decline with the increasing of sample weight,while the measured values of N has no obvious trend.While the sample weight are 70 ~90 mg,the precision and accuracy of C,H,N measured values all meet the demand