# 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 5.3.2: Sample purification

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

Apply 15 ml of the filtered extract (5.2.1) to the aluminium oxide column and discard the first 2 ml of eluate. Collect the next 5 ml and filter an aliquot through a 0,45 μm filter (4.6).
Proceed to the HPLC determination (5.4).

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/VIII/division/D/division/5/division/5.3/division/5.3.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-VIII/division-D/division-5/division-5.3/division-5.3.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.