Evaluate percentage fat content in milk, Chemistry

Assignment Help:

Q. Evaluate percentage Fat Content in Milk?

The fat content in milk can be determined through various procedures as:

Direct determination of fat by extraction with ether - Adam's coil method

  • Separation of fat by acid/ alkali treatment and its subsequent removal by ether-Werner-Schimdt and Gottleib method
  • Separation of fat by chemical means followed by centrifugation - Gerber method

The main principle behind the fat determination is  protein precipitation, which is further dissolved in acid to free fat globules. In some methods, amyl alcohol is also added to produce difference in the surface tension of fat globules and the supporting liquid, thus causing the aggregation and separation of fat.

As Gerber method gives fast results, thus, it is used in the dairy plants as a platform test for checking the quality of milk. In this test, fat is dissolved in hot amyl alcohol and its separation from heavy acid solution is affected by subjecting the mixture to centrifuging. In Gerber method, 10 ml of conc. H2SO4 is added into the gerber tube. 1 ml of amyl alcohol is added in this tube. 10.94 ml of the milk sample is added and the tube is stoppered. The tube is then inverted twice or thrice and shaken briskly to mix the ingredients. The tube is then centrifuged for 3 min at 1000 rpm to get the reading of fat in the stem of the tube.


Related Discussions:- Evaluate percentage fat content in milk

Diagonal relationship, What is the diagonal relationship between Beryllium ...

What is the diagonal relationship between Beryllium and Aluminium

Quantitative Test for Sucrose in Honey, Please give a stepwise procedure in...

Please give a stepwise procedure in carrying out quantitative test for Sucrose in Honey to determine its quality. Please also include Pure honey sucrose acceptable quantity.

Liquids- structure of liquids, Structure of liquids: Liquids have a lim...

Structure of liquids: Liquids have a limited degree of short-range order and are most adequately described in terms of a radial distribution function. The probability of findin

Physical properties of phenol, Physical properties of Phenol (a) Phenol...

Physical properties of Phenol (a) Phenol is a colorless crystalline, deliquescent solid. It attains pink colour on exposure to air and light. (b) Phenol is capable of formin

Estimate the osmotic pressure, A reverse osmosis membrane is used to desali...

A reverse osmosis membrane is used to desalinate high salinity groundwater. It is proposed to build an RO plant that will process about 500,000 liters/day of saline feed water cont

Crystal field splitting in tetrahedral field, Q. Crystal Field Splitting in...

Q. Crystal Field Splitting in Tetrahedral Field? A tetrahedron can be viewed as a part of cube where the metal ion occupies the centre of the cube and the four ligands are plac

Existence of positively charged nucleus was established by, Existence of po...

Existence of positively charged nucleus was established by: (1) Positive ray analysis   (2) α -ray scattering experiments    () X-ray analysis (4) Discharge tube exper

S block elements, why are salts of alkali metals diamagnetic

why are salts of alkali metals diamagnetic

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd