# First Commission Directive of 26 July 1979 laying down Community methods of analysis for testing certain sugars intended for human consumption (79/796/EEC), Division 6.1.4: Heat the flask and contents till boiling and allow to boil for exactly two minutes; the flask must not be removed from the heat source during the course of the rest of the procedure, or allowed to cease boiling.

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

Add three or four drops of methylene blue solution (4.4) at the end of the two-minute boiling period: the solution should be a definite blue colour.

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Source: https://www.legislation.gov.uk/eudr/1979/796/annex/II/division/8/division/6/division/6.1/division/6.1.4 (the official version)
Page: https://openlegislation.uk/eu-directive-1979-796/annex-II/division-8/division-6/division-6.1/division-6.1.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.