# 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 5.1.2: A recovery test shall be carried out by analysing the blank feed which has been fortified by addition of a quantity of olaquindox, similar to that present in the sample. To fortify at a level of 50 mg/kg, transfer 10,0 ml of the stock standard solution (3.5.1) to a 250 ml conical flask and evaporate the solution to ca. 0,5 ml. Add 50 g of the blank feed, mix thoroughly and leave for 10 min. mixing again several times before proceeding with the extraction step (5.2).

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

Note:For the purpose of this method the blank feed shall be similar in type to that of the sample and olaquindox must not be detected.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/VIII/division/B/division/5/division/5.1/division/5.1.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-VIII/division-B/division-5/division-5.1/division-5.1.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.