# First Commission Directive of 25 October 1985 on methods of analysis for edible caseins and caseinates (85/503/EEC), Division 7.1: Formula and method of calculation

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

The protein content of the sample, expressed as a percentage by mass, is given by:
V 1 — V 2 × T × 14 × 100 × 6,38 m × 1 000 = 8,932 V 1 — V 2 × T m
where:
V1 is the volume, in millilitres, of the standard volumetric hydrochloric acid solution (4.7) used in the determination (6.5);
V2 is the volume, in millilitres, of the standard volumetric hydrochloric acid solution (4.7) used in the blank test (6.3);
T is the strength of the standard volumetric hydrochloric acid solution (4.7) in mol/1;
m is the mass, in grams, of the test portion.
Calculate the protein content to the nearest 0,1 %.

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Source: https://www.legislation.gov.uk/eudr/1985/503/annex/II/division/3/division/1/division/7/division/7.1 (the official version)
Page: https://openlegislation.uk/eu-directive-1985-503/annex-II/division-3/division-1/division-7/division-7.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.