# Third Commission Directive of 27 September 1983 on the approximation of the laws of the Member States relating to methods of analysis necessary for checking the composition of cosmetic products (83/514/EEC), Division 7: GAS CHROMATOGRAPHY

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

The column must yield a resolution ‘R’ equal to, or better than, 1,5, where:
let: R = 2 d' r 2 - r 1 W 1 + W 2
r1 and r2 retention times (in minutes),
W1 and W2 peak widths at half height (in millimetres),
d' the chart speed (in millimetres per minute).
The following gas chromatographic conditions have been found suitable:
Column stainless steel.
Length 1,7 m.
Diameter 3 mm.
Support:
chromosorb WAW
sieve analysis 80 to 100 mesh.
Stationary phase 10 % OV 17.
Temperatures:
column 280 oC,
injector 280 oC,
detector 280 oC.
Carrier gas: oxygen-free nitrogen.
Pressure 2,3 bar.
Flow 30 ml/min.

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Source: https://www.legislation.gov.uk/eudr/1983/514/annex/division/15/division/B/division/7 (the official version)
Page: https://openlegislation.uk/eu-directive-1983-514/annex/division-15/division-B/division-7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.