# Fourth Commission Directive of 11 October 1985 on the approximation of the laws of the Member States relating to methods of analysis necessary for checking the composition of cosmetic products (85/490/EEC), Division 5.1: Preparation of the sample

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

Weigh accurately a quantity of the sample which may contain approximately 100 mg of quinine into a 100 ml standard flask, dissolve and make up to the mark with methanol (3.3).
Stopper the flask and leave for one hour at room temperature in an ultrasonic vibrator (4.2). Filter (4.3) and use the filtrate for the chromatography.

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Source: https://www.legislation.gov.uk/eudr/1985/490/annex/division/3/division/A/division/5/division/5.1 (the official version)
Page: https://openlegislation.uk/eu-directive-1985-490/annex/division-3/division-A/division-5/division-5.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.