天然气组成常规分析方法及其标准化

介绍了采用气相色谱法分析天然气组成的常用方法以及相关的标准,包括ISO、ASTM 以及GB的标准.目前,采用标准气体的外标法是国内外分析天然气组成采用的主要方法.根据ASTM D1945和GB/T 13610,主要介绍了外标法进行天然气常规分析的步骤和数据处理方法.在采用气相色谱分析时,需考虑仪器的检测器对天然气各组分,尤其是对甲烷的线性响应.新版的ISO 6974,增加了测量系统的特性和数理统计的方法,应引起分析工作者的注意.

Tailored Analysis of Natural Gas Composition and Related Standardization

The general used analytical methods for composition of natural gas and related standards are introduced, including the standards of ISO, ASTM and GB ( China national standard) . The External standard method by using RM (Reference Material) to analyze composition of natural gas is the main method in the world currently. According to ASTM D 1945 and GB/T 13610,the procedures and method for data processing of external standard method for tailored analysis of natural gas compositon are introduced. While analyzing the natural gas by gas chromatography, the linear response of detector for each component, especially for methane, should be considered. In the latest version standard of ISO 6974, measuring - system characteristics and statistics for processing of data are added, they should be paid more attention.