本文件为生物甲烷或压缩天然气（CNG）中压缩机油的取样和气相色谱分析提供了一般指导。压缩机油质量分数是通过在规定的操作条件下在聚结过滤器上取样来确定的（前两立方米的气体是指标准条件，在加油站交付）。 压缩机油是用于机械设备的润滑剂，其目的是减少气体的体积并增加气体的压力，以用于各种应用。 该方法仅适用于压缩气体（p>18 MPa）。 压缩机油含量以质量分数表示。 该方法的范围为3 mg/kg至30 mg/kg。

This document gives general guidance for the sampling and gas chromatographic analysis of compressor oil in biomethane or compressed natural gas (CNG). The compressor oil mass fraction is determined by sampling on coalescing filters under defined operational conditions (the two first cubic meters of gas referring to standard conditions, delivered at a refuelling station). Compressor oils are lubricants used in mechanical devices where the purpose is to reduce the volume and increase the pressure of gases for use in a variety of applications. The method is solely applicable to compressed gas (p>18 MPa). The compressor oil content is expressed as mass fraction. The scope of this method is from 3 mg/kg – 30 mg/kg.