# 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: Calculation of results

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

The amount of chlorine (X), expressed as % sodium chloride is calculated by using the following formula:
X=5,845×V1−V2mwhere:
V1 ml of silver nitrate solution 0,1 mol/l added
V2 ml of ammonium thiocyanate solution 0,1 mol/l used for titration
mweight of sample.
If the blank test indicates that silver nitrate solution 0,1 mol/l has been consumed deduct this value from the volume (V1 – V2).

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