# 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 3.8.1

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

Working standard copper solution (10 μg Cu/ml) prepared by diluting 1 part of the standard solution (3.8) with 9 parts of water and then diluting 1 part of the resulting solution with 9 parts of water.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/IV/division/C/division/3/division/3.8.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-IV/division-C/division-3/division-3.8.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.