GB/T 15000.5-1994 Directives for the work of reference materials(5)—Technologic rules for reference materials of chemical composition

GB/T 15000.1-1994 Directives for the work of reference materials(1) General rules for description of reference materials in technical standards GB/T 15000.2-1994 Directives for the work of reference materials(2) The common terms and definitions of reference materials GB/T 15000.3-1994 Directives for the work of reference materials(3) General principles and statistic methods for certification of reference materials

GB/T 15000.3-2008 Directives for the work of reference materials(3)—Reference materials—General and statistical principles for certification

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 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 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 10248-2005 Gas analysis—Preparation of calibration gas mixtures—Static volumetric methods GB/T 15000.2-1994 Directives for the work of reference materials(2) The common terms and definitions of reference materials GB/T 15000.2-2019 Directives for the work of reference materials—Part 2:Selected terms and definitions GB/T 15000.3-1994 Directives for the work of reference materials(3) General principles and statistic methods for certification of reference materials GB/T 15000.3-2008 Directives for the work of reference materials(3)—Reference materials—General and statistical principles for certification GB/T 15000.3-2023 Directives for the work of reference materials—Part 3:Reference materials—Characterization and assessment of homogeneity and stability GB/T 15000.4-2003 Directives for work of reference materials(4)—Contents of certificates and labels GB/T 15000.4-2019 Directives for the work of reference materials—Part 4:Contents of certificates,labels and accompanying documentation GB/T 5275.7-2025 Gas analysis—Preparation of calibration gas mixtures using dynamic methods— Part 7:Thermal mass-flow controllers GB/T 15000.4-2026 Directives for the work of reference materials—Part 4:Contents of certificates,labels and accompanying documentation