# Commission Regulation (EC) No 2870/2000 of 19 December 2000 laying down Community reference methods for the analysis of spirits drinks, Division 9.1: Response factor (RF i ) calculation

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

The response factor is calculated as follows
RF i = (C i ∕ area or height i )*(area or height is ∕ C is )
where:
C i is the concentration of trans-anethole in the standard solution A (4.5.1)
C is is the concentration of internal standard in the standard solution B (4.5.2)
area i is the area (or height) of the trans-anethole peak
area is the area (or height) of the internal standard peak
RF i is calculated from the five samples of solution C (4.5.4).

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Source: https://www.legislation.gov.uk/eur/2000/2870/annex/division/V/division/9/division/9.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2000-2870/annex/division-V/division-9/division-9.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.