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 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