本标准涵盖了天然气流化学成分的测定，其中需要己烷和重馏分的精确物理性质数据。本程序适用于可能含有氮和二氧化碳和/或碳氢化合物配合物C1至C14的气态碳氢化合物混合物，其范围在所列范围内。自1986年将本标准作为技术标准采用以来，本标准之前仅进行了较小的修订。在本次修订中，对已经过时且不反映当前行业惯例的部分进行了修订。此外，使用GPA 2145来反映GPA 2145的2009年修订版的示例计算，以及与GPA 2172中呈现的计算相关的所有计算均被删除，并参考GPA 2172。此外，本标准之前包含的QA/QC相关材料已被删除，并参考GPA 2198。 该标准最重要的变化包括更新方法，以保持与现代技术的一致性。

This standard covers the determination of the chemical composition of natural gas streams where precise physical property data of the hexanes and heavier fraction is required. This procedure is applicable for gaseous hydrocarbon mixes which may contain nitrogen and carbon dioxide and/or hydrocarbon complexes C1 through C14 that fall within the ranges listed.This standard had previously seen only minor revisions since its adoption as a technical standard in 1986. In this revision, portions that had become obsolete and that did not reflect current industry practices were revised. In addition, the example calculations that utilize GPA 2145 to reflect the 2009 revision of GPA 2145 and all calculations related to those presented in GPA 2172 were removed and referenced to GPA 2172.Also, the QA/QC related material previously included in this standard have been removed and referenced to GPA 2198.The most significant changes to the standard involve updates to the method to maintain consistency with modern technologies.