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

Atoms and molecules, what are the application of law of chemical combinatio...

what are the application of law of chemical combination?

Polarity and salvation, Polarity and salvation   A solvent is a liqu...

Polarity and salvation   A solvent is a liquid medium in which dissolved are known as solutes. Solvents are useful for storing species that would otherwise be in inconvenien

How many fluorescence photons will really be detected, How many fluorescenc...

How many fluorescence photons will really be detected on average by the photo detector during a 10 ms acquisition window if one diIC12 molecule is located in the illuminated area?

Nucleophilic replacement reactions, Nucleophilic Replacement Reactions ...

Nucleophilic Replacement Reactions  (i) Several replacement reactions, majorly at the saturated carbon atom in aliphatic compounds like alkyl halides, are brought about by nucl

Determine the acid insoluble ash in the sample of flour, Q. Determine the a...

Q. Determine the acid insoluble ash in the sample of flour? After undertaking this activity, you will be able to: • assess the mineral content in the given sample of flour,

Atoms, what is an atom

what is an atom

Electrochemistry, Q. Describe Electrochemistry Electricity (i.e., elect...

Q. Describe Electrochemistry Electricity (i.e., electric current) is a flow of electric charges. In metals, it is the flow of electrons. In electrolytes, it is the mov

In bohr''s model, In Bohr's model, atomic radius of the first orbit is γ th...

In Bohr's model, atomic radius of the first orbit is γ the radius of the 3rd orbit, is: (1) γ/ 3 (2)γ (3) 3γ (4) 9γ Ans:  9γ

First use quantum theory to explain the structure of atom, The first use o...

The first use of quantum theory to explain the structure of atom was made by: (1)  Heisenberg (2 )Bohr (3) Planck (4) Einstein Ans: Bohr

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