# First Commission Directive of 25 October 1985 on methods of analysis for edible caseins and caseinates (85/503/EEC), Division 6.3: Blank test

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

At the same time as the determination of the nitrogen content of the sample perform a blank determination using 0,5 grams of the sucrose (4.4) instead of the test portion, using the same apparatus, the same quantities of all reagents and the same procedure as described in 6.5. If the titration in the blank determination exceeds 0,5 ml of 0,1 mol/1 acid, the reagents shall be checked and the impure reagent or reagents purified or replaced.

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Source: https://www.legislation.gov.uk/eudr/1985/503/annex/II/division/3/division/1/division/6/division/6.3 (the official version)
Page: https://openlegislation.uk/eu-directive-1985-503/annex-II/division-3/division-1/division-6/division-6.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.