气相色谱法测定天然气组成的条件优化

发布时间：2018-03-20 01:36

本文选题：气相色谱法　切入点：FID-TCD并联检测　出处：《化学试剂》2017年04期 　论文类型：期刊论文

【摘要】：气相色谱法是天然气检测常用的方法,在一定条件下可以快速准确地对天然气的气体组成成分进行测定,设定合适的色谱条件是保证测定准确、可靠的关键。以FID-TCD并联分析技术为基础,对气相色谱法测定天然气组成的条件进行了实验分析,对测定过程中使用的色谱柱、温度、柱流速、进样口温度、检测器温度、TCD参考气等测定条件进行了优化,找出了各条件的平衡点,使得测定出的各种气体分子浓度在实验中能够呈现出良好的线性关系。为FID-TCD并联检测的气相色谱技术在测定天然气成分中的应用提供了参考,对提高测定的效率、灵敏度和准确性具有非常重要的意义。
[Abstract]:Gas chromatography is a common method for natural gas detection. Under certain conditions, the gas components of natural gas can be determined quickly and accurately, and the proper chromatographic conditions are to ensure the accuracy of the determination. On the basis of FID-TCD parallel analysis technology, the conditions of gas chromatographic determination of natural gas composition are analyzed experimentally. The chromatographic column, temperature, flow rate, injection port temperature used in the determination are analyzed. The temperature of the detector and the TCD reference gas were optimized, and the equilibrium points of each condition were found out. The results show that the molecular concentrations of various gases can show a good linear relationship in the experiment, which provides a reference for the application of the gas chromatographic technique of FID-TCD parallel detection in the determination of natural gas components, and improves the efficiency of the determination. Sensitivity and accuracy are of great significance.
【作者单位】：湖南省长沙燃气燃具监督检测中心;
【分类号】：TE642;O657.71

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