GB 6857-2008 pH Primary reagent—Potassium hydrogen phthalate

GB 6857-1986 pH Basic line Potassium hydrogen phthalate

GB 1257-2007 Working chemical—Potassium hydrogen phthalate GB/T 9723-2007 Chemical reagent—General rule for flame atomic absorption spectrometric analysis GB/T 601-2002 Chemical reagent Preparations of standard volumetric solutions GB/T 601-2016 Chemical reagent—Preparations of reference titration solutions GB/T 602-2002 Chemical reagent—Preparations of standard solutions for impurity GB/T 603-2002 Chemical reagent—Preparations of reagent solutions for use in test methods GB/T 603-2023 Chemical reagent—Preparations of reagent solutions for use in test methods GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB 6851-1986 pH Basic line General rules for certification GB 6851-2008 pH Primary reagent—General rules for certification GB/T 9729-1988 Chemical reagent General method for the determination of chloride GB/T 9729-2007 Chemical reagent—General method for the determination of chloride GB/T 9732-2007 Chemical reagent—General method for the determination of ammonium GB/T 9738-1988 Chemical reagent General method for the determination of water insoluble matter GB/T 9738-2008 Chemical reagent—General method for the determination of water insoluble matter GB/T 9739-1988 Chemical reagent General method for the determination of iron GB/T 9739-2006 Chemical reagent—General method for the determination of iron GB 15346-1994 Chemical reagent—Packaging and marking GB 15346-2012 Chemical reagent—Packaging and marking HG/T 3921-2006 Chemical reagents sampling and acceptance rules HG/T 3484-1999 Chemical reagent Standard of clear liquor,made from glass dust,and standard of transparence GB/T 602-2026 Chemical reagent—Preparations of standard solutions for impurity