GB/T 13530-2023Test methods for sodium ethoxylated alkyl sulfate (English PDF)

1 Scope

This document describes the determination of total active content, unsulfated content, average relative molecular mass in sodium ethoxylated alkyl sulfates method:

This document applies to the determination of sodium ethoxylated alkyl sulfate:

The method for the determination of total active matter in this document is also applicable to the determination of total active matter of ethoxylated alkylphenol sodium sulfate, the total active matter includes soluble

Alcohol-based organics: sodium ethoxylated alkyl sulfates (or sodium ethoxylated alkylphenol sulfates), polyethylene glycol sulfates, and nonionic components; flat

The method for determining the average relative molecular mass is applicable to ethoxylated sodium alkyl sulfate products with no more than 20 oxyethylene groups in each molecule:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document:

GB/T 5173 Determination of the content of anionic active substances in surfactant detergents Direct two-phase titration method (GB/T 5173-

2018, ISO 2271:1989, MOD)

GB/T 6682 Analytical laboratory water specifications and test methods (GB/T 6682-2008, ISO 3696:1987, MOD)

GB/T 13173 Surfactant detergent test method (GB/T 13173-2021, ISO 607:1980, ISO 697:

1981, ISO 4313:1976, ISO 4321:1977, ISO 4325:1990, ISO 21264:2019, MOD)

QB/T 2739 Preparation of test solutions for titration analysis (volume analysis) of commonly used test methods for washing products

3 Terms and Definitions

The following terms and definitions apply to this document:

3:1 total active matter totalactivematter

All ethanol solubles after chloride subtraction:

Note: When customers have objections to the content of anionic active substances, choose to measure the total active substance content:

3:2

Anionic active matter anionicactivematter

Sulfated anionic moiety in sodium ethoxylated alkyl sulfates:

3:3

Unsulfated matter unsulfatedmatter

There are no sulfated nonionic moieties (polyethoxylated fatty alcohols, fatty alcohols, alkanes) in sodium ethoxylated alkyl sulfates:

3:4

The mass of sodium ethoxylated alkyl sulfate per mole, i:e: the total mass of sodium ethoxylated alkyl sulfate and the mass of ethoxylated alkyl sulfate determined by two-phase titration

The ratio of the amount of sodium sulfate to the substance: […]