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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。
Gas chromatography is a commonly used method for gas detection. Under certain conditions, the gas composition of natural gas can be quickly and accurately determined. Setting the appropriate chromatographic conditions is the key to ensure the accurate and reliable determination. Based on the FID-TCD parallel analysis technique, the gas chromatographic conditions for determining the composition of natural gas were experimentally analyzed. The chromatographic column, temperature, column flow rate, inlet temperature, detector temperature, TCD reference gas And other determination conditions were optimized to find out the equilibrium point of each condition, making the determination of the concentration of various gas molecules in the experiment can show a good linear relationship. It provides a reference for the application of gas chromatography with parallel detection of FID-TCD in determining the composition of natural gas, which is of great significance to improve the efficiency, sensitivity and accuracy of the determination.