摘要
首次用气体同位素质谱仪MAT271测试天然气组成。测试了MAT271的精密度,证明该仪器符合气体组分分析要求。对比了MAT271与色谱中C2/C1值,误差不超过0.01。检测了天然气每个主要组分标准谱,通过数学方法确定了每个组分的定量计算公式。通过该方法测试了标准气体,其中非烃组分相对标准误差均低于0.01%,烃类组分标准偏差也基本在0.1%以下。并将测得的组分结果与标准气体组分数据进行了比对。总结了该方法的优缺点,此方法适合于干气(CH4含量大于90%)的组分检测。
It is the first time to establish a method of natural gas analysis by using isotope mass spectrometer（MAT271）.We tested the precision of MAT271,and the results showed that MAT271 is fit for nature gas composition analysis.The work compared the value of C2/C1 tested by MAT271 and chromatography,the error is not more than 0.01.And we also tested each pure composition of natural gas,summarized a set of quantitative calculation methods.By means of this method we tested the calibration gases.The relative standard of non-hydrocarbon is lower than 0.01%,and it is below 0.1% for hydrocarbon.The research compared the results with the standard values of the calibration gases.We summarized the advantages and disadvantages of this method.We hold that the method is suitable for dry gas composition analysis.
出处
《现代科学仪器》
2011年第5期103-106,共4页
Modern Scientific Instruments
