# Regulation (EC) No 648/2004 of the European Parliament and of the Council of 31 March 2004 on detergents (Text with EEA relevance), Division D: ANALYTICAL METHODS FOR AMPHOTERIC SURFACTANTS

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

The determination of amphoteric surfactants in the tests shall be done by analysis following the procedures listed below:
1..If cationics absent:
The method in use in the Federal Republic of Germany, (1989) DIN 38 409-Teil 20.
2..Otherwise:
Orange II method (Boiteux, 1984).
For those amphoteric surfactants not reacting to the abovementioned tests, or if it seems more appropriate for reasons of efficiency or precision (this must be justified), appropriate specific instrumental analyses such as HPLC or GC are to be applied. Samples of the pure surfactant of interest shall be provided by the manufacturer to the competent authority upon request.

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Source: https://www.legislation.gov.uk/eur/2004/648/annex/II/division/1/division/D (the official version)
Page: https://openlegislation.uk/eu-regulation-2004-648/annex-II/division-1/division-D
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.