Council Decision of 14 November 1992 laying down methods for the analysis and testing of heat-treated milk for direct human consumption (92/608/EEC) (c. 608)

ANEX II U.K.

IV. DETERMINATION OF TOTAL NITROGEN CONTENT U.K.

8. EXPRESSION OF RESULTS U.K.

8.1. Calculation and formula: U.K.

Calculate the nitrogen content (W_N), expressed in grams of nitrogen per 100 g of product by:

where:

W_N

=

the nitrogen content.

V

=

the volume in millilitres of the standard volumetric solution of acid used in the determination.

V_o

=

the volume in millilitres of the standard volumetric solution of acid used in the blank test,

c

=

the concentration, expressed as moles per litre of the acid standard volumetric solution (4.7.).

m

=

the mass in grams of the test portion.

Round off the result to the nearest 0,001 g per 100 g.

8.2. Precision U.K.

8.2.1. Repeatability (r): 0,007 g per 100 g. U.K.

8.2.2. Reproducibility (R): 0,015 g per 100 g. U.K.