# 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, Appendix A

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

Determination of linear gas speed
Inject 1:3 μl of methane (or propane) into the gas chromatograph after adjusting it to the normal operating conditions. Measure the time the gas takes to run through the column from the moment it is injected until the peak emerges (tM).
The linear speed in cm/s is given by L/tM where L is the length of the column, in cm, and tM is the time measured in s.

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