# 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 4.2.3.1: Treatment of samples

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

Acidify to pH 1 with a few drops of hydrochloric acid (4.2.1.8) and filter if necessary.
In certain cases it may be advisable to dilute the sample. If so acidify it with hydrochloric acid before dilution.

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Source: https://www.legislation.gov.uk/eudr/1983/514/annex/division/14/division/4/division/4.2/division/4.2.3/division/4.2.3.1 (the official version)
Page: https://openlegislation.uk/eu-directive-1983-514/annex/division-14/division-4/division-4.2/division-4.2.3/division-4.2.3.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.