Milkotester Master Pro Operating Instructions Manual page 26

Sixth – determine the total protein content by formula (p.3.2.3.4.А)
Proteins = SNF * 0,367 = 8.50 * 0.367 = 3.12 %
Proteins = SNF * 0,367 = 8.23 * 0.367 = 3.02 %
So, when calibrating the milk analyzer we'll use samples with the
following parameters:
milk fat
SNF
density
lactose
salts
proteins
Determination of fat content – Gerber's method, described in Methods p.
3.4.
Density determination – using aerometer, described in Methods p. 3.3.
SNF determination – by formula – p. 3.2.3.1.B
Determination of Lactose content – by formula – p. 3.2.3.2.А
Determination of solids/salts content – by formula – p. 3.2.3.3.А
Total protein content determination – by formula – p. 3.2.3.4.А
Example: Determination of the quality parameters for two samples
sheep milk (low fat and high fat), obtained and prepared according p. 2.3.1
and 2.4.1.
First – determine the fat content in the samples, using the Gerber's
method (p.3.2.)
Suppose that for the first sample the result is 5,6 %М, for the second – 9,8
%М.
Second – determine the milk density, using aerometer (p.3.1.)
Suppose that the results are 1,0352 for the first sample and 1,0300
for the second
Third – Calculate the SNF content using the formula (p.3.2.3.1.B)
∗ +
, 0 075 5 6 , 100
=
SNF
, 0
I st sample
(low fat)
2,00
8,50
1,0316
4,67
0,71
3,12
5.1.3.2. For sheep milk
−
100 , 1 / 0352
=
10 , 11
378
26
Ultrasonic milk analyzers
∗ +
, 0 075 9 8 ,
=
% SNF
Operating Instructions Master Pro
Milkotester Ltd
II nd sample
(high fat)
5,90
8,23
1,0274
4,53
0,68
3,02
−
100 100 , 1 / 0300
=
, 9 65
, 0 378
%