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

Explain the natural environmental system, Question 1: (i) With the aid...

Question 1: (i) With the aid of a diagram, briefly explain the natural environmental system. (ii) Explain the green house effect, and give 2 examples of green house gases

Name the building blocks of lecithin, Name the building blocks of lecithin....

Name the building blocks of lecithin. Show the head and tail structures of both lipids in the structure above.   Lipids are substances that are soluble in organic solvent

#organic chemistry, how do you answer organic chemistry based questions

how do you answer organic chemistry based questions

Define interfacial potential differences - galvanic cell, Define Interfacia...

Define Interfacial potential differences? What is the source of an open-circuit, zero-current cell potential? When no electric current passes through the cell, the electric pot

What numerical prefixes indicate in ligands, Q. What Numerical prefixes ind...

Q. What Numerical prefixes indicate in ligands? In any complex species, the ligands are quoted in alphabetical order, without regard to charge, before the name of the central m

Flame test, During a flame test why is calcium''s flame not persistent, whi...

During a flame test why is calcium''s flame not persistent, while that of strontium is? Ans) Because it does not have many ions as compared to the Strontium. It is the ions whic

Sources and impacts of suspended solids, 1.  Discuss how you would go about...

1.  Discuss how you would go about collecting data for an analysis of the water budget of a region. 2.  Discuss the sources and impacts of suspended solids. 3. The reaction o

Number of neutrons in heavy hydrogen atom is, Number of neutrons in heavy h...

Number of neutrons in heavy hydrogen atom is: (1) 0        (2) 1        (3) 2        (4) 3 Ans:  1

Explain curie point and hystereris, Explain Curie point and hystereris? ...

Explain Curie point and hystereris? An ordinary piece of iron generally has little or no net magnetic moment. Though, if it is placed in a strong enough external magnetic fie

Rubber - polymer, Rubber - polymer It is a polymer that is able of retu...

Rubber - polymer It is a polymer that is able of returning to its original size, shape or length later than being deformed or stretched. It a kind of elastomer. Rubber is of tw

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