LABEC M-MIA-LA User Manual
Page 79
Ultrasonic milkanalyser
Operation manual
04.11.09
77/107
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 solids content by formula (p.3.2.3.3.А /
Solids = SNF * 0,075 = 10.11 * 0.075 = 0.76 %
Solids. = 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