Milkotester Master Pro Operating Instructions Manual page 23

А/ When the solids and fat are known
SNF is calculated by subtracting the fat percentage from the solids.
SNF = Total Solids – F (% )
where
Total Solids in (%),
F – fat content in (%),
This formula is used for determination of SNF in whey, buttermilk, and
cream.
B/ Known quantity of fat and density (most commonly used method when
maximum accuracy is needed).
We recommend the following formula:
This is a universal formula and actual for milk of almost all kind of cows
and sheep all over the world.
5.1.2.3.2. Determination of lactose content
We recommend the following formulas:
А/ for cow milk
Lact. = SNF * 0,55 (% )
where
SNF – content of SNF in percentages (%),
0,55 – constant coefficient.
B/ for sheep milk
Lact. = SNF* 0,45 (% )
where
SNF –solids-non-fat content in percentages (%),
0,45 – constant coefficient.
This is an actual coefficient for sheep breeds on the territory of the
Balkan Peninsula.
∗ +
, 0 075 F % 100
=
SNF
, 0
23
Ultrasonic milk analyzers
−
100 / density
378
Operating Instructions Master Pro
Milkotester Ltd