Question Bank - Agriculture Officer

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Gerber test is used to determine -

A.
Protein percent in milk
B.
Fat percent in milk
C.
Acidity of milk
D.
SNF % in milk

Solution:

The correct answer is Fat Percent in milk Explanation:Milk fat is made up of fatty acid molecules made up of glycerol, a 3 carbon compound. The most common type of fat is Triglyceride or Triacylglycerol. Milk fat approximately contains 65% saturated, 30% monounsaturated, and 5% polyunsaturated fatty acids. Fat content in milk can be determined by two methods œAnalytical method and œCommercial method. Analytical method of determining milk fat comprises 3 different methods viz. , Rose-Gottliebs method, Adams method and Mojonniers method. Commercial method comprises of Gerber method and Babcoks method. Gerber method:This method is named after Dr. Gerber, who devised this method. Gerber method is also known as Fucoma test. In Gerbers method fat alone is separated from milk by subjecting the milk to digestion by the addition concentrated sulphuric acid and by the process of centrifugation, the fat is separated and measured. Additional InformationParameterMethod of DeterminationProtein contentKjeldahl methodAcidity contentTitration methodSolid Non-Fat contentGravimetric method. Using formula method (Richmondss or, Babcocks, or Fleismanns method, BIS/ISI method). Richmonds sliding rule.

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