It is designed for trace and trace sulfide analysis in gas samples. The whole system adopts the current world's top inert technology flow path to prevent the adsorption of sulfide. A special sulfide cold trap is used to ensure a high recovery rate of sulfide. After the sample is enriched and concentrated by a cold trap, and then thermally analyzed in an instant, it enters the gas chromatograph for separation, and is detected by mass spectrometry or other detectors. The concentration of each component is quantitatively analyzed by the standard substance mass spectrum and retention time comparison, internal standard method or external standard method. Mainly used for sulfide in samples. Meet the following standards: