# 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 5.5.1: Quantitative analysis of the methyl and ethyl esters

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

With the aid of the integrator, determine the areas of the peaks corresponding to the methyl heptadecanoate internal standard, the methyl esters of the C 16 and C 18 fatty acids and the ethyl esters of the C 16 and C 18 fatty acids.
Determine the content of each alkyl ester, in mg/kg of fat, as follows:
Ester, mg ∕ kg = A x × m s. × 1000 A s × m
where:
A x area corresponding to the peak for the individual C 16 and C 18 ester, in computer counts
A s area corresponding to the peak for the methyl heptadecanoate internal standard, in computer counts
m s mass of the methyl heptadecanoate internal standard added, in milligrams;
m mass of the sample taken for determination, in grams.

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Source: https://www.legislation.gov.uk/eur/1991/2568/annex/XX/division/5/division/5.5/division/5.5.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-1991-2568/annex-XX/division-5/division-5.5/division-5.5.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.