ASTM D4084-07(2017)

1.1 This test method covers the determination of hydrogen sulfide (H₂S) in gaseous fuels. It is applicable to the measurement of H₂S in natural gas, liquefied petroleum gas (LPG), substitute natural gas, landfill gas, sewage treatment off gasses, recycle gas, flare gasses, and mixtures of fuel gases. This method can also be used to measure the hydrogen sulfide concentration in carbon dioxide. Air does not interfere. The applicable range is 0.1 to 16 parts per million by volume (ppm/v) (approximately 0.1 to 22 mg/m³) and may be extended to 100 % H₂S by manual or automatic volumetric dilution.