# 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 7.1.1: Co-chromatography

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

A sample extract (5.2.1 or 5.2.2) is fortified by the addition of an appropriate amount of a calibration solution (3.10.3). The amount of added lasalocid sodium must be similar to the amount of lasalocid sodium found in the sample extract. Only the height of the lasalocid sodium peak shall be enhanced after taking into account the amount of lasalocid sodium added and the dilution of the extract. The peak width, at half height, must be within ± 10 % of the original peak width produced by the unfortified sample extract.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/IV/division/G/division/7/division/7.1/division/7.1.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-IV/division-G/division-7/division-7.1/division-7.1.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.