1. Determination of sulfur components in natural gas: A review
2. ISO 4260 (E): International Standard: “Petroleum Products and Hydrocarbon Determination of Sulfur Content - Wickbold Combustion Method”, Geneva, Switzerland, 1987.
3. ISO 6326 - 1 (E): International Standard: “Natural Gas - Determination Compounds - Part 1: General Introduction”, Geneva, Switzerland, 1989.
4. ISO 6326 - 2 (E): International Standard: “Gas Analysis - Determination Compounds in Natural Gas - Part 2: Gas Chromatographic Method Using trochemical Detector for the Determination of Odoriferous Sulfur Compounds”, Geneva, Swizerland, 1981.
5. ISO 6326 - 3 (E): International Standard: “Natural Gas - Determination Compounds - Part 3: Determination of Hydrogen Sulphide, Mercaptan Sulfur and Carbonyl Sulphide by Potentiometry Potentionmetry”, Geneva, Switzerland, 1989.