GB/T 7445-1995 Pure hydrogen and high pruity hydrogen and ultra pure hydrogen

GB 7445-1987 GB 7446-1987

GB/T 3634.2-2011 Hydrogen—Part 2:Pure hydrogen,high pure hydrogen and ultrapure hydrogen

GB 5009.251-2016 National Food Safety Standards: Determination of 1,2-Propylene Glycol in Foods GB 5009.252-2016 The National Standard for Food Safety: Determination of Acetylpropionic Acid in Foods GB 5009.253-2016 Determination of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in animal source foods under national standards for food safety GB 5009.254-2016 National Food Safety Standards Determination of Polydimethylsiloxane in Animal and Plant Oils and Fats GB 5009.255-2016 The national standard for food safety: Determination of fructans in food GB 5009.256-2016 National Food Safety Standards: Determination of Multiple Phosphoric Acids in Foods GB 5009.256-2025 GB 5009.257-2016 The National Standard for Food Safety: Determination of Trans Fatty Acids in Foods GB 5009.258-2016 The National Standard for Food Safety: Determination of Cottonseed Oil in Foods GB 5009.259-2016 The National Standard for Food Safety: Determination of Biotin in Foods GB 5009.259-2023 Food Safety National Standard: Determination of Biotin in Foods GB 5009.260-2016 The National Standard for Food Safety: Determination of Copper Malate in Foods GB 5009.261-2016 National Food Safety Standards: Determination of Neurotoxic Shellfish Toxins in Bivalves GB 5009.262-2016 National Food Safety Standards: Determination of Solvent Residues in Foods GB 5009.263-2016 The National Standards for Food Safety: Determination of Aspartame and Aminobutyrin in Foods GB 5009.264-2016 The national standard for food safety: Determination of benzyl benzoate in food GB 5009.265-2016 National Food Safety Standards: Determination of Polynuclear Aromatic Hydrocarbons in Foods GB 5009.265-2021 The National Standard for Food Safety: Determination of Polynuclear Aromatic Hydrocarbons in Foods GB 5009.266-2016 The National Standard for Food Safety: Determination of Methanol in Foods GB 5009.267-2016 National Standards for Food Safety: Determination of Iodine in Foods GB 5009.267-2020 The National Standard of Food Safety: Determination of Iodine in Foods GB 5009.268-2016 National Standards for Food Safety: Determination of Multiple Elements in Foods GB 5009.268-2025 GB 5009.269-2016 National Standards for Food Safety - Determination of talc in food GB 5009.270-2016 The National Standards for Food Safety: Determination of Inositol in Foods GB 5009.270-2023 The National Standard of Food Safety: Determination of Inositol in Foods GB 5009.271-2016 The national standard for food safety: Determination of phthalates in food GB 5009.272-2016 The national standard for food safety: Determination of phosphatidylcholine, phosphatidylethanolamine, and phosphatidylinositol in food GB 5009.273-2016 The National Standard for Food Safety: Determination of Microcystins in Aquatic Products GB 5009.274-2016 National Food Safety Standards Determination of Western Canadian Poisonous Toxins in Aquatic Products GB 5009.275-2016 The National Standards for Food Safety: Determination of Boric Acid in Foods GB 5009.276-2016 National standard for food safety - Determination of glucose lactate-δ-syn- lactate in food GB 5009.277-2016 Determination of sodium diacetate in food: National standard for food safety GB 5009.278-2016 The National Standard for Food Safety: Determination of Ethanedianediamide tetraacetic acid salts in food GB 5009.279-2016 National Standards for Food Safety - Determination of Xylitol, Sorbitol, Maltose Tartaric Acid in Foods GB 5009.280-2020 The Determination of Residual Amount of 4-Heptylresorcinol in Foods: National Standard of Food Safety GB 5009.281-2020 The Determination of Residual Amounts of Cinnamaldehyde in Foods: National Standards for Food Safety GB 5009.282-2020 The National Standard for Food Safety: Determination of 1-Methylimidazole, 2-Methylimidazole, and 4-Methylimidazole in Foods GB 5009.283-2021 National Food Safety Standard Determination of Azoxystrobin in Foodstuffs GB 5009.284-2021 The National Standards for Food Safety: Determination of Vanillin, Methyl Vanillin, Ethyl Vanillin, and Coumarin in Foods GB 5009.285-2022 National Standards for Food Safety - Determination of Vitamin B12 in Foods GB 5009.286-2022 The Determination of Natamycin in Foods: National Standards for Food Safety GB 5009.287-2022 The National Standards for Food Safety: Determination of Tannish Orange in Foods GB 5009.288-2023 National standard for food safety: Determination of cochineal red in food GB 5009.289-2023 The National Standard for Food Safety: Determination of Low-molecular-weight Galactooligosaccharides in Foods GB 5009.290-2023 The Determination of Vitamin K2 in Foods: National Standards for Food Safety GB 5009.291-2023 National Food Safety Standards - Determination of Chlorate and Perchlorate in Foods GB 5009.292-2023 National Standards for Food Safety: Determination of β-apo-8’-carotenal in Foods GB 5009.293-2023 The National Standard for Food Safety: Determination of Monolaurin in Foods GB 5009.294-2023 National Food Safety Standards: Determination of Tryptophan in Foods GB 5009.295-2023 Food Safety National Standards - General Principles for Chemical Analysis Method Validation GB 5009.296-2023 The National Standard for Food Safety: Determination of Vitamin D in Foods GB 5009.297-2023 National Standards for Food Safety: Determination of Molybdenum in Foods GB 5009.298-2023 National Standards for Food Safety: Determination of Three-Chlorosugar Inulin (Sucralose) in Foods GB 5009.299-2024 The National Standard for Food Safety: Determination of Lactoferrin in Foods GB 5009.300-2025 The Determination of L-carnitine in Foods National Standard of Food Safety GB 5009.301-2025 National Standards for Food Safety - Determination of osmotic pressure in food GB 5009.302-2025 GB 5009.303-2025 GB 5009.304-2025 National Standards for Food Safety: Determination of Tri- and Hexavalent Chromium in Foods GB 5009.305-2025 National Standards for Food Safety: Determination of Bisphenol A, Bisphenol F, and Bisphenol S in Foods GB 5009.306-2025 GB 5009.307-2025 National Standards for Food Safety: Determination of Formaldehyde in Foods GB 5009.308-2025 National standard for food safety - Determination of ascorbic acid palmitate in food GB 5009.309-2025 National standard for food safety: Determination of asparagine and glutamine in food GB/T 5832.2-1986 Determination of trace water in the gases—Dew point method GB/T 5832.2-2008 Determination of moisture in gases—Part 2:Dew point method GB/T 5832.2-2016 Gas analysis—Determination of moisture—Part 2:Dew point method GB/T 6681-2003 General rules for sampling gaseous chemical products GB 7144-1999 Colored cylinder mark for gases GB/T 7144-2016 Coloured cylinder mark for gases

JIS K 0512-1974