LABEC M-MIA-LA - Manual (Page 77)

Ultrasonic milkanalyser
Operation manual 04.11.09 75/107
1.8-2% FAT; 8.7-9% SNF; 3,3-3,5 % Protein; 4,8-4,9% Lactose; 0,75 Salts;
1030-1033 kg/m
3
Density.
The second cow milk sample with high fat content to be with the following
parameters:
5-5,5% FAT; 8.4-8,79% SNF; 3,1-3,2% Protein; 4,6-4,7% Lactose; 0,7 Salts;
1028-1029 kg/m
3 Density.
Samples with medial values of the separate parameters are received by
mixing the two boundary values in a definite proportion.
Preserve the samples, using above described method for their longer
storage.
When using samples, stored shortly, preliminary pour the sample from one
vessel to another in order to distribute the milk components evenly paying
attention not to form foam in the sample.
When the samples are stored for a longer period it is recommended to warm
it up to 35-45 °С, and the vessel to be shaken carefully. In case that there is a
cream stuck on the vessel’s surfaces – remove it. The sample is poured from
vessel to vessel several times and is cooled down (advisable to 20 °С /.
If there is separated liquefied fat or white particles with irregular form on the
vessel’s walls this sample could not be used.
Whey and buttermilk
The samples are poured several times from vessel to vessel and if needed
gradual heating with stirring with cooling down is done.
Cream
The sample is slowly warmed up to 35 – 40 °С in water bath. The fat is
dispersed wholly by carefully shaking and if necessary, by stirring and
pouring it from vessel to vessel till its full homogenization.
From homogenized cream is prepared sample for analyses by diluting it with
distilled water in degree, sufficient for the components of the diluted cream to
be reached in the measuring range of the analyser.
5. Advisable scheme for independently determination the content of
different parameters in milk and its derivatives
When is not possible to use the help of authorized laboratories and above
mentioned milk analysers we recommend you to follow the scheme: