GB/T 11275-2007: Surface active agents -- Determination of water content

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Scope

This Standard specifies the method for the determination of the water content of surface
active agents. Xylene azeotropic distillation can be used for powdery, slurry and liquid
products with water content (mass fraction) greater than 5%. 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 applicable method
for powdery, slurry and liquid products with water content (mass fraction) less than 1%.
However, the specimen contains basic compounds such as silicate, carbonate,
hydroxide and borate, which will affect the measured value, so the basic compounds in
the specimen should be analyzed before measurement.

Basic Data

Standard ID	GB/T 11275-2007 (GB/T11275-2007)
Description (Translated English)	Surface active agents -- Determination of water content
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G72
Classification of International Standard	71.100.40
Word Count Estimation	9,960
Date of Issue	2007-08-13
Date of Implementation	2008-02-01
Older Standard (superseded by this standard)	GB/T 11275-1995; GB/T 7380-1995
Quoted Standard	GB/T 6372; GB/T 6682
Adopted Standard	ISO 4317-1991, MOD
Regulation (derived from)	National Standard Approval Announcement 2007 No.8 (Total No.108)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the method for measuring the moisture content of surfactant. Water content (mass fraction) of more than 5 % of the powder, slurry and liquid products can be produced I xylene azeotropic distillation. However, the azeotropic distillation of water-soluble N -containing volatiles products, such products containing alcohol. I containing water (mass fraction) of less than l% of the powder, slurry and liquid products Karl Fischer method is the only methods available. But sample containing I.