气相色谱法分析天然气的组成
张秋萍
武汉市度量衡管理所,武汉 430000
Analysis of the compositions of natural gas by gas chromatography
张秋萍
Wuhan Weights and Measures Manage Institute, Wuhan 430000, China
摘要:使用一种新型气相色谱仪准确分析天然气的组成。以天然气标准物质为样品,对色谱柱、阀切换时间、柱箱温度控制等方面进行优化,建立了良好的色谱分析条件,利用外标法确定了天然气中各组分的保留时间。在同一最佳色谱分析条件下,标准物质中各组分连续检测两次测定结果的差值不大于0.11%,满足国家标准GB/T 13610-2014的要求,且与标准值相对误差的绝对值小于5%。测定结果组分含量应与所用标准物质浓度的单位保持一致。所建立分析方法准确可靠,适用于天然气的常规分析。
Abstract:A new type gas chromatograph was employed to accurately analyze the compositions of natural gas.The standard material of natural gas was applied as the sample. The best chromatographic conditions were established by optimizing chromatographic column, valves changing-over time and the temperature of column oven. The external standard method was utilized to verify the remain time of the compositions of natural gas. The difference between the two testing results met the requirements of GB/T 13610-2014 under the same optimum gas chromatographic analysis conditions.The relative error between the testing results and the standard value of the standard material was less than 5%, which confirmed the accuracy and repeatability of this analyzing process. The testing result was consistent with that of the applied standard material. The established method is accurate, reliable and suitable for the conventional analysis of natural gas.
关键词:天然气组成;气相色谱法;气路流程;保留时间
Keywords:composition of natural gas; gas chromatography; gas flow statues; remain time
本文引用格式:
张秋萍.气相色谱法分析天然气的组成[J]. 化学分析计量,2018,27(1):77-82.
ZHANG Q P. Analysis of the compositions of natural gas by gas chromatography[J]. Chemical analysis and meterage,2018,27(1):77-82.
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