This part of GB/T 13531 specifies the method for the determination of the pH value of cosmetics. This section applies to the determination of the pH value of cosmetics.
GB/T 13531.1-2008 Referenced Document
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 13531.1-2008 history
2008GB/T 13531.1-2008 General methods on determination of cosmetics.Determination of pH
2000GB/T 13531.1-2000 General methods on determination of cosmetics-Determination of pH