This standard specifies the method for the determination of silicon content in sodium hydroxide for chemical fibers. This standard is applicable to the determination of sodium hydroxide products with a silicon dioxide content of 2μg-200μg in the sample.
GB/T 11213.4-2006 Referenced Document
GB/T 4348.1-2000 Sodium hydroxide for industrial use-Determination of sodium hydroxide and sodium carbonate content
GB/T 6682 Water for analytical laboratory use.Specification and test methods*, 2008-05-15 Update
GB/T 11213.4-2006 history
2006GB/T 11213.4-2006 Sodium hydroxide for chemical fiber use.Determination of silicon content.Reduced molybdosilicate spectrophotometric method
1989GB/T 11213.4-1989 Sodium hydroxide for chemical fiber use--Determination of silicon mass fraction--Reduced molybdo silicate spectrometric method