# Commission Regulation (EC) No 152/2009 of 27 January 2009 laying down the methods of sampling and analysis for the official control of feed (Text with EEA relevance), Division 6.1: Calculation for titration according to 5.3.1

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

The content of crude protein, expressed as a percentage by weight, is calculated according to the following formula:
V0−V1×c×0,014×100×6,25mwhere:
Vo is the volume (ml) of NaOH (3.10 or 3.11) used in the blank test,
V1 is the volume (ml) of NaOH (3.10 or 3.11) used in the sample titration,
cis the concentration (mol/l) of sodium hydroxide (3.10 or 3.11),
mis the weight (g) of sample.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/III/division/C/division/6/division/6.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-III/division-C/division-6/division-6.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.