# Commission Regulation (EEC) No 2568/91 of 11 July 1991 on the characteristics of olive oil and olive-residue oil and on the relevant methods of analysis, Division 2.1: Preparation of the test sample

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

If necessary, use the mechanical mill, which has previously been properly cleaned, to grind the laboratory sample in order to reduce it to particles that can pass completely through the sieve.
Use about one twentieth of the sample to complete the process of cleaning the mill, discard the ground material, grind the remainder and collect, mix carefully and analyze without delay.

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Source: https://www.legislation.gov.uk/eur/1991/2568/annex/XV/division/2/division/2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-1991-2568/annex-XV/division-2/division-2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.