GB/T 33443-2016 Determination of hydrogen sulfide carbonyl sulfide methanethiol and dimethyl sulfide in coal-based syngas—Gas chromatograph

GB/T 3634.2-2011 Hydrogen—Part 2:Pure hydrogen,high pure hydrogen and ultrapure hydrogen GB/T 3723-1999 Sampling of chemical products for industrial use—Safety in sampling GB/T 5274-1985 Gas analysis—Preparation of calibration gas mixtures—Weighing methods GB/T 5274-2008 Gas analysis—Preparation of calibration gas mixtures—Gravimetric method GB/T 5274.1-2018 Gas analysis—Preparation of calibration gas mixtures—Part 1:Gravimetric method for class Ⅰ mixtures GB/T 6681-2003 General rules for sampling gaseous chemical products GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 8979-1996 Pure nitrogen GB/T 8979-2008 Pure nitrogen and high purity nitrogen and ultra pure nitrogen GB/T 13277-1991 Compressed air for general use—Quality classes GB/T 13277.1-2008 Compressed air—Part 1:Contaminants and purity classes GB/T 13277.1-2023 Compressed air—Part 1:Contaminants and purity classes GB/T 13277.2-2015 Compressed air—Part 2:Test methods for oil aerosol content GB/T 13277.3-2015 Compressed air—Part 3:Test methods for measurement of humidity GB/T 13277.4-2015 Compressed air—Part 4:Test methods for solid particle content GB/T 13277.5-2019 Compressed air—Part 5:Test methods for oil vapour and organic solvent content GB/T 13277.6-2021 Compressed air—Part 6:Test methods for gaseous contaminant content GB/T 13277.7-2021 Compressed air—Part 7:Test method for viable microbiological contaminant content GB/T 13277.8-2023 Compressed air—Part 8:Test methods for solid particle content by mass concentration GB/T 13277.9-2022 Compressed air—Part 9:Test methods for liquid water content GB/T 8979-2025 Pure nitrogen,high purity nitrogen and ultra pure nitrogen GB/T 3634.2-2025 Hydrogen—Part 2:Pure hydrogen,high purity hydrogen and ultra purity hydrogen