# 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 6.2: Variation of the specific extinction (ΔΚ)

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

The variation of the absolute value of the extinction (ΔΚ) is given by:
Δ K = K m − Kλ m − 4 + Kλ m + 4 2
where Km is the specific extinction at the wavelength for maximum absorption at 270 nm and 268 nm depending on the solvent used.
The results should be expressed to two decimal places.

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Source: https://www.legislation.gov.uk/eur/1991/2568/annex/IX/division/6/division/6.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-1991-2568/annex-IX/division-6/division-6.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.