IDF 105:2008 specifies the characteristics of seven types of butyrometer for use in the determination of the fat content of whole milk, partly skimmed milk and skimmed milk by the Gerber method specified in ISO. Search for articles by this. Accuracy of Fat Estimation by Gerber's Method (Trans, title. Gerber method for the determination of fat in milk and milk products - Methods: Amendment A. NZS 2246:1969 Methods for the chemical analysis of liquid milk and cream. Determination of Fat in Milk by Gerber Method. Objective: To determine the fat level in milk by Gerber method. Use: test for grading or payment system. Advantages: relatively simple to use. Disadvantages: equipment needed. Introduction. The traditional standard reference method for fat analysis is based on either weight or volumetric determination. There are many analytical methods for the determination of the fat content of milk; the Gerber test is widely used all over. Sulphuric acid is used to dissolve the protein that forms the membrane around the fat (fat globules) and amyl alcohol is added to improve the separation of fat from other solids. Equipment and materials. Sulphuric acid (density 1. C, colourless). Amyl alcohol. Butyrometers: 6%, 8% and 1. Stoppers and shaker stands for butyrometers made from a suitable grade of rubber or plastics. Acid pipette for sulphuric acid (with rubber suction device). Centrifuge, electric or hand driven. Water bath at 6. 5 +. The reading has to be done quickly before the milk cools. The butyrometers should be emptied into a special container for the very corrosive acid- milk liquid, and the butyrometers should be washed in warm water and dried before the next use. Fat testing is often carried out on composite or random samples in order.
Amylalcohol for Gerber's milk fat determination. Determination of milk fat Milk is secreted by the mammary gland of mammals.
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