LABEC M-MIA-A - Manual (Page 76)

Ultrasonic milk analyser
milk fat 2,00 5,90
SNF 8,50 8,23
density 1,0316 1,0274
lactose 4,67 4,53
salts 0,71 0,68
proteins 3,12 3,02
5.2. For sheep milk
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)
Fourth – determine the lactose content by the formula (p.3.2.3.2.А)
Lact. = SNF * 0,45 = 10.11 * 0.45 = 4.55 %
Lact. = SNF * 0,45 = 9.65 * 0.45 = 4.34 %
Fifth – determine the salts content by formula (p.3.2.3.3.А /
Salts = SNF * 0,075 = 10.11 * 0.075 = 0.76 %
Salts. = SNF * 0,075 = 9.65 * 0.075 = 0.72 %
Sixth – determine the total protein content by formula (p.3.2.3.4.А)
Proteins = SNF * 0,475 = 10.11 * 0.475 = 4.80 %
Proteins = SNF * 0,475 = 9.65 * 0,475 = 4.58 %
% 11 , 10
378 , 0
0352 , 1 / 100 100 6 , 5 075 , 0
=
− + ∗
=
SNF
% 65 , 9
378 , 0
0300 , 1 / 100 100 8 , 9 075 , 0
=
− + ∗
=
SNF
Operation manual MRC.VER.01-02.10