This part of GB/T 11213 stipulates the determination method of sodium hydroxide content in sodium hydroxide for chemical fiber. It is usually expressed in two different ways in terms of the mass fraction of NaOH: w1—total alkalinity (calculated as NaOH); W2—sodium hydroxide content (calculated as NaOH), that is, total alkalinity minus sodium carbonate content.
GB/T 11213.1-2007 Referenced Document
GB/T 601 Chemical reagent.Preparations of reference titration solutions*, 2016-10-13 Update
GB/T 6682 Water for analytical laboratory use.Specification and test methods*, 2008-05-15 Update
GB/T 7698 Sodium hydroxide for industrial use.Determination of carbonates content.Titrimetric method*, 2014-09-03 Update
GB/T 11213.1-2007 history
2007GB/T 11213.1-2007 Sodium hydroxide for chemical fiber use.Determination of sodium hydroxide content
1989GB/T 11213.1-1989 Sodium hydroxide for chemical fiber--Determination method of mass fraction