# Regulation (EC) No 648/2004 of the European Parliament and of the Council of 31 March 2004 on detergents (Text with EEA relevance), Division 4.1.3: Analytical control

Extent: E+W+S+N.I.

After homogenising, the concentration of anionic surfactants in the synthetic detergent is determined according to the MBAS analytical procedure. The soap content is determined by a suitable analytical method.
This analysis of the products is necessary to calculate the quantities required for preparing fractions for the biodegradability test.
Quantitative extraction is not necessary; however, at least 80 % of the anionic surfactants should be extracted. Usually, 90 % or more is obtained.

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Source: https://www.legislation.gov.uk/eur/2004/648/annex/VIII/division/4/division/4.1/division/4.1.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2004-648/annex-VIII/division-4/division-4.1/division-4.1.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.