Total Reduced Sulfur (S) monitoring
Total reduced sulfur(s), which include hydrogen sulfide (H2S), methyl mercaptan (methanethiol, CH3SH), dimethyl sulfide (CH3SCH3), and dimethyl disulfide (CH3S2CH3), occur naturally in the environment and can also be present in numerous industrial gaseous streams – petroleum refining, natural gas extraction, and chemical operations like the pulp/paper industry. Hydrogen sulfide is the most prevalent of the total reduced sulfurs, and is commonly found in volcanic gases, marshes and swamps, wetlands and mud flats, sulfur springs and decaying organic matter. Additionally, hydrogen sulfide is produced by living organisms, including human beings, through the digestion and metabolization of sulfur-containing materials. It must be noted that sulfur dioxide (SO2), sulfur trioxide (SO3) and sulfuric acid mist are not included in the determination of TRS, as these are oxidized sulfur compounds and are permitted and monitored separately from TRS.