GB/T 11275-2007
Surface active agents.Determination of water content (English Version)

Standard No.

GB/T 11275-2007

Language

Chinese, Available in English version

Release Date

2007

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 11275-2007

Replace

GB/T 11275-1995 GB/T 7380-1995

Scope

This standard specifies the method for the determination of the water content of surfactants. The powdery, slurry and liquid products with water content (mass fraction) greater than 5% can adopt xylene azeotropic distillation. However, the azeotropic distillation method is not suitable for products containing water-soluble volatiles, such as products containing ethanol. The Karl Fischer method is the only available method for powdery, slurry and liquid products with water content (mass fraction) less than 1%. However, the sample contains basic compounds such as silicates, carbonates, hydroxides, and borates, which will affect the measured value, so the basic compounds in the sample should be analyzed before the measurement.

GB/T 11275-2007 Referenced Document

• GB/T 6372 Surface active agents and detergents. Methods of sample division
• GB/T 6682 Water for analytical laboratory use.Specification and test methods*， 2008-05-15 Update

GB/T 11275-2007 history

• 2007 GB/T 11275-2007 Surface active agents.Determination of water content
• 1995 GB/T 11275-1995 Surface active agents and soaps--Determination of water content--Azeotropic distillation method

GB/T 11275-2007 Surface active agents.Determination of water content has been changed from GB/T 7380-1995 Surface active agents and detergents--Determination of water content--Karl Fischer method.