GB/T 33089-2016 Chemical reagent—N,N-dimethyl-p-phenylenediamine dihydrochloride

GB/T 9721-2006 Chemical reagent—General rules for the molecular absorption spectrophotometry (ultraviolet and visible) GB/T 9725-2007 Chemical reagent—General rule for potentiometric titration GB/T 9741-2008 Chemical reagent—General method for the determination of residue after ignition 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/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 GB/T 602-2026 Chemical reagent—Preparations of standard solutions for impurity