GB/T 15435-1995 Ambient air—Determination of nitrogen dioxide—Saltzman method

GB/T 5275-2005 Gas analysis—Preparation of calibration gas mixtures—Permeation method GB/T 5275.1-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 1:Methods of calibration GB/T 5275.1-2024 Gas analysis—Preparation of calibration gas mixtures using dynamic methods—Part 1:General aspects GB/T 5275.2-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 2:Volumetric pumps GB/T 5275.2-2022 Gas analysis—Preparation of calibration gas mixtures using dynamic methods—Part 2:Piston pumps GB/T 5275.4-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 4:Continuous syringe injection method GB/T 5275.5-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 5:Capillary calibration devices GB/T 5275.6-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 6:Gritical orifices GB/T 5275.6-2023 Gas analysis—Preparation of calibration gas mixtures using dynamic methods—Part 6:Critical flow orifices GB/T 5275.7-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 7:Thermal mass-flow controllers GB/T 5275.8-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 8:Diffusion method GB/T 5275.9-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 9:Saturation method GB/T 5275.10-2009 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 10:Permeation method GB/T 5275.11-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 11:Electrochemical generation GB/T 5275.7-2025 Gas analysis—Preparation of calibration gas mixtures using dynamic methods— Part 7:Thermal mass-flow controllers