This standard specifies the method for the determination of urea content in liquid optical brighteners. This standard applies to the determination of urea content in liquid optical brighteners.
GB/T 33401-2016 Referenced Document
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 33401-2016 history
2016GB/T 33401-2016 Determination of the urea in liquid fluorescent whitening agent products