How do you test milk for butterfat?

The most reliable, straightforward method is the Gerber butterfat test method, and it is conducted as follows:

1. Add 10 ml of Gerber acid into the butyrometer followed by 10.75 ml of the milk sample and then 1 ml of amyl alcohol.
2. Cork the butyrometer tightly and mix the contents.

How do you measure fat in milk?

The desired percentage of butterfat is written in the centre of the square and, in the two left-hand corners, the percentages of butterfat in the available ingredients. 0 percent is the fat content of the skimmed milk. 3.9 percent is the fat content of the milk received.

How do you read a Babcock bottle?

The Babcock test is based upon the use of a definite weight of milk or cream in the test bottle. In the case of cream 9 grams are weighed directly into the test bottle which’ is graduated to read direct. When testing milk the 17.6 c.c. pipette is used for measuring the milk into the test bottle.

How do you use a Babcock bottle?

How Does a Babcock Tester Work?

1. Using a pipette, measure 17.6 cubic centimeters (cc) of milk into a specially made, thin necked flask.
2. Add 17.5 cc of sulphuric acid to the test flask and gently swirl the acid and milk together.
3. Spin the flasks in “whirler,” or centrifuge, for 5 minutes, rotating at 700 to 1200 rpm.

What is mojonnier method?

Mojonnier method Is a gravimetric method that uses organic solvents to extract fat. Subsequently the solvent is evaporated and the fat is determined by weighing the dry fatty extract. Then the fat content is measured in a special flask (butyrometer).

How do you read a butyrometer?

The theory behind using 10.75 ml milk in the pipette is as follows: Gerber butyrometer is graduated on 0-10 scale and calibrated in such a way that each 1% division represents 0.125 ml of fat. If 1 % represents 0.1125 then 100 % will be represented 11.25 g.

How do you do a Babcock test?

Babcock Test process. Measure milk into graduated test tube. You usually take 18 grams of milk or 17.6 milliliters. Add 17.6 milliliters of 90-92% sulfuric acid. Centrifuge at 50°C. Measure fat which will be floating on top of liquid in the test tube.

What is Babcock test for milk?

Babcock test. The Babcock test is an inexpensive and practical procedure to determine the fat content of milk.

What is the Babcock method of extraction?

The Babcock Method. Stephen Babcock at the University of Wisconsin developed a non-solvent wet extraction method. he found that by adding concentrated sulphuric acid (92% or 1.82 specific gravity) to 18 grams of milk, the fat would separate out.

What is the duration of the Babcock graduated test?

A specific Babcock graduated test tube was designed for the method and the amount of fat quoted as %w/w milk. The whole test is about 45 minutes.