Milkotester Master Pro Operating Instructions Manual page 22

5.1.2.1.6. Determination of solids in milk
Solids describe the content of fats, proteins, carbohydrates and
salts. Its value may be used for determination of each of these parameters
in case of known other values.
Salts are determined by drying till constant mass – see Appendix
Methods.
5.1.2.2. Express methods by using another milk analyzers
It is possible another device to be used for determination of some of
the quality parameters of milk and its derivatives samples, intended for
calibration, but it has to be noted that it is possible incorrect values to be
received, that's why it is necessary to be completely sure in the accuracy
of their readings.
Usage of Milkoscan and other milk analyzers based on the infrared
measurement principle.
By using it the fat, lactose and protein content may be determined.
Problem may arise with determination of salts and SNF. This is due to the
impossibility of the infrared method to determine the solids and in order to
receive the solids in the sample their meaning is accepted as a constant.
5.1.2.3. Determination of some of the parameters by formulas
There is dependence between the different parameters in milk and
its density, which may be expressed with mathematical equation. On that
base different formulas, tested and confirmed by the classical laboratory
methods for analyses, are developed. We recommend the following:
For determination of SNF the correlation dependence exists
between the milk's density, fat and SNF in the milk. When the density and
the fat are known, the SNF can be calculated.
There are several formulas with different applicability.
5.1.2.3.1. SNF determination.
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Ultrasonic milk analyzers
Operating Instructions Master Pro
Milkotester Ltd