When unstable gas condensate is analyzed using direct sample injection into a chromatograph, the design features and operating parameters of the metering valve significantly affect the accuracy and reproducibility of the analysis. In this work, a study was made of the influence of the characteristics of two types of metering valves, namely, high-pressure and high-temperature sample metering device and sample metering valve with a syringeless injector, on unstable gas condensate analysis [conforming to GSO (State Object Standard) 10525–2014] when the sample is injected into the chromatograph without its degassing, It is shown that use of a metering valve with a heated stem helps get high metrological characteristics. Significant deviation of analysis results from the regulatory requirements was observed for hydrocarbons starting with C₂₈ when a metering valve having an injector was used without heating the stem.

当使用直接将样品注入色谱仪来分析不稳定的气体冷凝物时，计量阀的设计特征和操作参数会显着影响分析的准确性和重现性。本工作研究了高压高温样品计量装置和无注射器进样器样品计量阀两种计量阀的特性对不稳定气体凝析油分析的影响[符合GSO（国家目标标准）10525–2014] 当样品在没有脱气的情况下注入色谱仪时，表明使用带有加热阀杆的计量阀有助于获得高计量特性。对于以 C 开头的碳氢化合物，观察到分析结果与监管要求存在显着偏差₂₈当使用带有喷射器的计量阀而不加热阀杆时。