In these equipments the milk is a chemically modified and light ray of different wavelength / frequency capacities are passed through the sample. Latest methods include use of electronic devices such as Milko tester or Milkoscan or Infrared milk analyzer (IRMA). The lower meniscus of the surface of the fat column is noted without any parallelex error, which gives the fat percentage. International Organization for Standardization. The stopper is adjusted to bring the lower meniscus of the fat column against ‘o’ unit graduation. ISO/IZ 2446 Milk - Determination of fat content (routine method). The tube is placed in water bath at 65 oC for 5 minutes. Centrifuging is done at 1100 RPM for 5 minutes and removed from the centrifuge.
The butyrometer is then placed in the centrifuge with the stem towards the centre and the centrifuge is kept well balanced. The tube is then placed in water bath at 65 oC for 5minutes. The Associate Referee recommends that the Gerber method using a weighed test portion be adopted as First Action with applicability limited to whole milk. The tube is then inverted several times, So that the acid in the stem and in the bulb are thoroughly mixed with the milk.
GERBER METHOD FOR MILK FAT PDF CRACK
A dry rubber lock stopper without any crack should be used to close the butyrometer using regulating pin. The pipette should not be blown are shaken to discharge the last drop. Then 10.75 ml of well-mixed milk is pipetted out and layered over the acid carefully so that there are two separate layers. Hence there are various methods existing to measure Fat, CLR & SNF and some of them are described below.
GERBER METHOD FOR MILK FAT PDF FREE
After free flow stops, wait 3 seconds and blow out last drop. Discharge slowly at first (to pre-vent 'local action'), then allow to drain. Fill the 11 ml Gerber pipet with the prepared milk sample. Addition of amyl alcohol prevents the partial charring of sugar and fat.ġ0 ml of Gerber’s acid is pipetted out into butyrometer carefully along the side. By way of review, this is the Gerber procedure for testing milk: Into a Gerber 8 milk bottle, add 10 ml sulfuric acid (1.820-1.825 sp. If the acid used is of higher or lower specific gravity then heat produced will affect the other effects.Īmyl alcohol of specific gravity is 0.815-0.818 is used in this experiment. The heat thus produced will also help the fat to remain in fluid condition.
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