This standard specifies the method for the determination of iron content in industrial sodium hydroxide by 1,10-phenanthroline spectrophotometry. This standard is applicable to industrial sodium hydroxide products with iron content greater than or equal to 0.00005% (mass fraction),
GB/T 4348.3-2012 Referenced Document
GB/T 603 Preparation of preparations and products used in chemical reagent test methods*, 2023-08-06 Update
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 4348.3-2012 history
2012GB/T 4348.3-2012 Sodium hydroxide for industrial use.Determination of iron content.1,10-phenanthroline photometric method
2002GB/T 4348.3-2002 Sodium hydroxide for industrial use--Determination of iron content-1,10--Phenanthroline photometric method