Analysis of C5 fraction and extractive distillationsolvent by two-dimensional gas chromatography with heart-cutting technique

Abstract

Two-dimensional gas chromatography using the heart-cutting technique was applied to the analysis of the C₅ fraction and extractive distillation solvent. High-resolution separation of the C₅ fraction and N-methylpyrrolidone with water was obtained under optimized conditions. The separated components were identified by mass spectroscopy using standard samples. The recoveries of standard compounds were 99.5–100.6%, and the relative standard deviations were all less than 3%. It took only 30 min to finish a determination. Industrial samples from Yanshan Petrochemical Industry Corporation were also analyzed using the method. The experimental results indicate that the method is specific, sensitive and suitable for the determination of the C₅ fraction and the extractive distillation solvent. Thus, the method is expected to be widely applicable and will be valuable in industrial applications.