# 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 Note 5:

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

Carefully control the pressure of the HPLC pump, the ethyl ether can increase the pressure, adjust the flow to keep the pressure under control.

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Source: https://www.legislation.gov.uk/eur/1991/2568/annex/XIX/part/2/division/6/annotation/Note (the official version)
Page: https://openlegislation.uk/eu-regulation-1991-2568/annex-XIX/part-2/division-6/annotation/Note
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.