GB/T 223.67-2008
Iron, steel and alloy - Determination of sulfur content -Methylene blue spectrophotometric method
YS/T 574.7-2009
Methods for chemical analysis of zirconium powder for electro-vacuum uses—The methylene blue spectrophotometric method for determination of sulphur
GB/T 3654.6-2008
Ferroniobium - Determination of sulfur content - Combustion-iodate titrimetric method,methylene blue photometric method and infrared absorption method
GB/T 4698.6-2019
Methods for chemical analysis of titanium sponge,titanium and titanium alloys—Part 6:Determination of boron content—Methylene blue spectrophotometry and inductively coupled plasma atomic emission spectrometry
GB/T 4698.6-1996
Sponge titanium, titanium and titanium alloys—Determination of boron content—Extraction—methylene blue spectrophotometric method
YS/T 574.7-2006
Chemical analysis of zirconium powder for electro-vacuum uses--The methylene blue photometric method for determination of sulphur
GB/T 3654.7-1983
Methods for chemical analysis of ferroniobium The methylene blue photometric method for the determination of sul fur content
GB/T 223.67-1989
Methods for chemical analysis of iron, steel and alloy—The reducing distillation-methylene blue photometric method for the determination of sulfur content
GB/T 3256.7-1982
Chemical analysis of zirconium powder for electro-vacuum uses--The methylene blue photometric method for determination of sulphur
GB/T 1400-2014
Chemical reagent―Hexamethylene tetramine
GB/T 9015-1998
Hexamethylene tetramine for industrial use
GB/Z 38062-2019
Nanotechnologies—Determination of specific surface area of graphene materials—Methylene blue adsorption method
GB/T 12496.10-1999
Test methods of wooden activated carbon--Determination of methylene blue adsorption
GB/T 16489-1996
Water quality--Determination ofsulfide--Methylene blue spectrophotometric method
HJ 1226-2021
GB/T 44376.1-2024
Fine bubble technology—Water treatment applications—Part 1:Test method for evaluating ozone fine bubble water generating systems by the decolorization of methylene blue
HJ 824-2017
HG/T 5842\uff5e5844-2021
HJ 833-2017
GB.T 40897-2021
Determination of alkali sulfides and alkaline earth sulfides in cosmetics—Methylene blue spectrophotometric method