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GB/T 17518-2012 General method for determination of silicon content of chemical products—Reduced molybdosilicate spectrophotometric method 180.0 via email in 1~3 business day valid
GB/T 23945-2009 Inorganic chemicals for industrial use—General method for the determination of chloride content—Visible turbidimetric method 120.0 via email in 1~3 business day valid
GB/T 23274.5-2009 Methods for chemical analysis of stannic oxide - Part 5: Determination of antimony content - Malachite green photometric method 120.0 via email in 1~3 business day valid
GB/T 23835.8-2009 Lithium perchlorate anhydrous - Part 8: Determination of potassium and sodium content 120.0 via email in 1~3 business day valid
GB/T 8570.3-2010 Determination of liquefied anhydrous ammonia—Part 3:Residue content—Gravimetric method 120.0 via email in 1~3 business day valid
GB/T 23835.7-2009 Lithium perchlorate anhydrous - Part 7: Determination of sulfate content 120.0 via email in 1~3 business day valid
GB/T 8570.6-2010 Determination of liquefied anhydrous ammonia—Part 6:Oil content—Gravimetric and infra-red methods 120.0 via email in 1~3 business day valid
GB/T 23948-2009 Inorganic chemicals for industrial use—General method for the determination of water insoluble matter 120.0 via email in 1~3 business day valid
GB 6709-1986 Method of the determination for the content of sodium ferrocyanide 15.0 via email in 1~3 business day valid
GB/T 8570.1-2008 Determination of liquefied anhydrous ammonia - Part 1: Taking a laboratory sample 120.0 via email in 1~3 business day valid
GB/T 29338-2012 Production technical regulation for phosphoric acid(wet-process) 270.0 via email in 1~3 business day valid
GB/T 23774-2009 Inorganic chemicas for industrial use - General method for the determination of whiteness 120.0 via email in 1~3 business day valid
GB/T 27569-2011 Production technical regulation for Hydrofluoric acid 300.0 via email in 1~5 business day valid
GB/T 8570.2-2010 Determination of liquefied anhydrous ammonia—Part 2:Estimating of ammonia content 120.0 via email in 1~3 business day valid
GB/T 16753-1997 Terms for silicate building products 225.0 via email in 1~3 business day valid
GB/T 23274.2-2009 Methods for chemical analysis of stannic oxide - Part 2: Determination of iron content - 1,10-phenanthroline photometric method 120.0 via email in 1~3 business day valid
GB/T 23278.2-2009 Methods for chemical analysis of sodium stannate—Part 2:Determination of iron content—1,10-phenanthroline photometric method 120.0 via email in 1~3 business day valid
GB/T 23274.6-2009 Methods for chemical analysis of stannic oxide - Part 6: Determination of sulfate content - Visual turbidimetry method 120.0 via email in 1~3 business day valid
GB/T 23835.3-2009 Lithium perchlorate anhydrous - Part 3: Determination of moisture content 120.0 via email in 1~3 business day valid
GB/T 23842-2009 General method for the determination of silicon content of inorganic chemicals - Reduced molybdosilicate spectrophotometric method 180.0 via email in 1~3 business day valid
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