# Third Commission Directive of 27 September 1983 on the approximation of the laws of the Member States relating to methods of analysis necessary for checking the composition of cosmetic products (83/514/EEC), Division 3: PRINCIPLE

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

Barium chloride solution is added to a test portion of the cosmetic product diluted in an aqueous methanol medium. Any precipitate which may form is filtered or centrifuged off. This procedure avoids the loss of ammonia, during steam distillation, from certain ammonium salts such as the carbonate and hydrogencarbonate and those of the fatty acids, with the exception of ammonium acetate.
The ammonia is steam distilled from the filtrate or supernatant and is determined by potentiometric or other titration.

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Source: https://www.legislation.gov.uk/eudr/1983/514/annex/division/12/division/3 (the official version)
Page: https://openlegislation.uk/eu-directive-1983-514/annex/division-12/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.