# 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 6: EXPRESSION OF RESULTS

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

Acidity as a percentage of oleic acid by weight is equal to:
V × c × M 1000 × 100 m = V × c × M 10 × m
where:
V the volume of titrated potassium hydroxide solution (or sodium hydroxide) used, in millilitres;
c the exact concentration in moles per litre of the titrated solution of potassium hydroxide (or sodium hydroxide) used;
M 282 g/mol, the molar mass in grams per mole of oleic acid;
m the mass of the sample, in grams.
Oleic acidity is reported as follows:
(a) to two decimal places for values from 0 up to and including 1;
(b) to one decimal place for values from 1 up to and including 100.

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