GB/T 11275-2026 Active National standards

GB/T 11275-2026 Surface active agents—Determination of water content

Publish Date: 2026-02-27 Implement Date: 2026-09-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 11275-2026

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Basic standards and general methods for surfactants

ICS Name: Surfactants and other auxiliary agents

Publish Date: 2026-02-27

Implement Date: 2026-09-01

Pages: 20 pages

Scope

This document describes the method for determining the water content of surfactants.
This document is applicable to the determination of the water content of powdered, slurry, and liquid surfactants.
Method A - Karl Fischer coulometric titration is suitable for samples with a water content (mass fraction) greater than 2%; Method B - Karl Fischer coulometric titration is suitable for samples with a water content (mass fraction) less than 0.1%; and for samples with a water content between 0.1% and 2%, both methods are applicable. When the sample contains alkaline compounds such as silicates, carbonates, hydroxides, and borates that can react with the Karl Fischer reagent and result in an overestimated measured value, it is necessary to analyze the alkaline compounds in the sample before the determination.
Method C - Xylene azeotropic distillation is suitable for samples with a water content (mass fraction) greater than 5%, but the azeotropic distillation method is not applicable to products containing water-soluble volatile substances, such as those containing ethanol.