# First Commission Directive of 13 November 1979 laying down Community methods of analysis for testing certain partly or wholly dehydrated preserved milk for human consumption (79/1067/EEC), Division 4.5: Solution E

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

Gibb's reagent.
Dissolve 0,040 g of 2,6-dibromoquinone 1,4 — chloroimide (O.C6H2Br2.NCl) in 10 ml of 96 % ethanol. Store the solution in a dark glass bottle kept in a refrigerator. Discard this reagent when it has become discoloured.

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Source: https://www.legislation.gov.uk/eudr/1979/1067/annex/II/division/8/division/4/division/4.5 (the official version)
Page: https://openlegislation.uk/eu-directive-1979-1067/annex-II/division-8/division-4/division-4.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.