When analyzing unstable gas condensate using direct sample injection into the chromatograph, the design features and operating parameters of the sampling device have a significant impact on the accuracy and repeatability of the analysis. In this work, the influence of the characteristics of two types of sampling devices was studied: a high-pressure sampler in a high-temperature design; a sampler with a syringe-free injector, on the efficiency of the analysis of unstable gas condensate (GSO 10525–2014) using the direct injection method. It was shown that the use of a high-pressure sampler in a high-temperature design allowed achieving high accuracy and repeatability of analysis (data correspond to STO Gazprom 5.5–2007). When using a standard sampler, a significant deviation from the regulatory requirements for hydrocarbons starting from C28 was observed.
