# 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 3.7

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

Standard iron solution (1 000 μg Fe/ml) prepared as follows or equivalent commercially available solution: dissolve 1 g of iron wire in 200 ml of 6 mol/litre hydrochloric acid (3.2), add 16 ml of hydrogen peroxide (3.6) and make up to one litre with water.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/IV/division/C/division/3/division/3.7 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-IV/division-C/division-3/division-3.7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.