# 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 3.1

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

Solution of 4-dimethylaminobenzaldehyde: dissolve 1,6 g of 4-DMAB in 100 ml of 96 % ethanol and add 10 ml of hydrochloric acid (ρ201,19 g/ml). This reagent keeps for a maximum period of two weeks.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/III/division/D/division/3/division/3.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-III/division-D/division-3/division-3.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.