# 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 3.27.2: Stock standard solution of cysteic acid and methionine sulphone, c = 1,25 μmol/ml.

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

Dissolve 0,2115 g cysteic acid (3.16.2) and 0,2265 g methionine sulphone (3.16.3) in citrate buffer (3.24) in a 1 litre graduated flask and make up to mark with citrate buffer. Store below 5 oC for not more than 12 months. This solution is not used if the stock standard solution (3.27.1) contains cysteic acid and methionine sulphone.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/III/division/F/division/3/division/3.27.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-III/division-F/division-3/division-3.27.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.