# 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 4.1

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

Silica gel with a granule size of between 60 and 200 μm.
Place the gel in the furnace at 500 °C for at least four hours. After cooling, add 2 % water in relation to the quantity of sampled silica gel. Shake well to homogenise the slurry. Keep in darkness for at least 12 hours prior to use.

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Source: https://www.legislation.gov.uk/eur/1991/2568/annex/IV/division/4/division/4.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-1991-2568/annex-IV/division-4/division-4.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.