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

The protein content of the sample, expressed as a percentage by mass, is given by:

\frac{(V_{1} {— V}_{2}) × T × 14 × 100 × 6,38}{m × 1 000} = \frac{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 %.

Division 7.1 Formula and method of calculation