This document describes the analysis method for sulfur components in various LPGs. A highly selective pulsed flame photometric detector is used, and a dual-channel configuration is employed for the analysis. This method allows for the analysis of all components of interest in one run.
The document details a custom two-channel system developed for the analysis of sulfur-containing components such as H2S, COS, and mercaptanes. The setup utilizes a Varian 450-GC Gas Chromatograph with Pulsed Flame Photometric Detection (PFPD) to overcome matrix quenching issues found in single-channel systems.
The system is designed to analyze H2S, COS, methylmercaptane, ethylmercaptane, propylmercaptane, iso-propylmercaptane, tert-butylmercaptane, and tetrahydrothiophene.
The CP-Sil 5CB column measures 30 m x 0.32 mm with a film thickness of 5 µm.
Injection is performed at 220 °C with a split ratio of either 1:30 or 1:20, while the oven ramps from 35°C to 250 °C.