石油产品 - 沸点分布测定 - 气相色谱法

[中文适用范围]： 本文件规定了一种测定石油产品沸程分布的方法。该方法适用于本文件确定的在大气压下最终沸点为 538°C 或更低的石油产品和馏分。本文件不适用于汽油样品或汽油组分。该方法仅限于沸程大于 55°C 且蒸气压足够低以允许在环境温度下取样的产品。该文件描述了两种程序。a) 程序 A 允许选择更多的色谱柱和分析条件，例如填充色谱柱和毛细管色谱柱以及除火焰离子化检测器之外的热导检测器。分析时间范围为 14 分钟至 60 分钟。b) 程序 B 仅限于三个毛细管色谱柱，不需要稀释样品。分析时间缩短至约 8 分钟。这两种程序都已成功应用于含有高达 20%（体积分数）的脂肪酸甲酯 (FAME) 的样品。注：在本文件中，术语“%（质量分数）”和“%（体积分数）”用于表示材料的质量分数（µ）、体积分数（φ）。 [外文原描述]： This document specifies a method for the determination of the boiling range distribution of petroleum products. The method is applicable to petroleum products and fractions with a final boiling point of 538 °C or lower at atmospheric pressure as determined by this document. This document does not apply to gasoline samples or gasoline components. The method is limited to products having a boiling range greater than 55 °C and having a vapour pressure sufficiently low to permit sampling at ambient temperature. The document describes two procedures. a) Procedure A allows a larger selection of columns and analysis conditions, such as packed and capillary columns as well as a thermal conductivity detector in addition to the flame ionization detector. Analysis times range from 14 min to 60 min. b) Procedure B is restricted to only three capillary columns and requires no sample dilution. The analysis time is reduced to about 8 min. Both procedures have been successfully applied to samples containing fatty acid methyl esters (FAME) up to 20 % (volume fraction). NOTE For the purposes of this document, the terms "% (mass fraction)" and "% (volume fraction)" are used to represent the mass fraction ( µ ), the volume fraction ( φ ) of a material.