StudentShare solutions
Triangle menu

The Iodine Number of an Oil or Fat - Essay Example

Nobody downloaded yet

Extract of sample
The Iodine Number of an Oil or Fat

The fatty acids without carbon-carbon double bonds are classified as saturated, and those containing carbon-carbon double bonds are classified as unsaturated. Palmitic and stearic acids are the most common saturated fatty acids, and oleic and linoleic acids are the most common unsaturated fatty acids. A way to measure the relative degree of unsaturation of a fat or an oil is to determine its iodine number.
The Iodine Number is defined as the number of grams of iodine taken up by 100g of fat. The amount of iodine consumed is determined by titrating the iodine released, after addition of excess potassium iodide with standard sodium thiosulphate solution and comparing with a blank in which the fat is omitted (Pocklington, 1990).
In general, fats have lower iodine numbers than oils because oils have greater percentages of carbon-carbon bonds that are double bonds. For example, typical iodine numbers for butter are 25 to 40, and for corn oil, 115 to 130.
The fat and oil samples with 0.3 g weight were placed inside a clean and dry conical flask. Chloroform (10 cm3) was then added into the reaction vessel. Using a burette, 25cm3 of Wijs solution was carefully added dropwise. The flask was kept in the dark for 30 - 45 minutes for the reaction to occur. After stirring the solution, a spatula of potassium iodide was added. The solution was mixed until the dissolution was complete. De-ionised water (100cm3) was then added into the solution. Titration was performed using the 0.1mol dm-3 solution of sodium thiosulphate provided until a pale straw colour was observed. After this, a starch indicator was added until the blue colour disappears. A blank was also prepared separately. The iodine numbers (I2 No) of the samples were computed using the Equation (1):
where B and T are the respective blank and test values from titration (cm3), and W is the weight of the fat and oil (g). The B-T values represent the difference ...Show more

Summary

Fats are generally solids and oils are generally liquids at ordinary room temperatures. The characteristics of fats and oils are related to the properties of the fatty acids that they contain. The larger the number of carbon atoms,…
Author : jasperdach
The Iodine Number of an Oil or Fat essay example
Read Text Preview
Save Your Time for More Important Things
Let us write or edit the essay on your topic
"The Iodine Number of an Oil or Fat"
with a personal 20% discount.
Grab the best paper

Check these samples - they also fit your topic

Fake fat
7) The Center for Science in the Public Interest (CSPI) has initially identified its discovery by Procter & Gamble in 1968 “in their quest to create a way of increasing premature babies' intake of fat, synthesized a fat substitute called sucrose polyester.
1 pages (250 words) Essay
Iodine 131 properties and usages in Brachytherapy
Iodine 131 is produced by the fission of uranium atoms during the functioning of nuclear reactors and also during the detonation of nuclear weapons where uranium or plutonium is involved. One of its most important uses of iodine 131 is in nuclear medicine, especially in radiation therapy where it is used to treat thyroid cancer and thyrotoxicosis.
5 pages (1250 words) Essay
Dietary analysis
2.1.1 Carbohydrates: constitute of monosaccharide, disaccharides and polysaccharides. There are mainly obtained from rice, bread, noodles and other grains. Monosaccharide takes less time to digest as compared to the complex sugars such as the polysaccharide.
8 pages (2000 words) Essay
The Iodine Number of Fats
Oils contain a higher percentage of unsaturated fatty acids than fats. Fats from animal sources tend to be solids and fats from vegetable sources tend to be liquids. There are a number of naturally occurring fatty acids. The fatty acids without carbon-carbon double bonds are classified as saturated, and those containing carbon-carbon double bonds are classified as unsaturated.
4 pages (1000 words) Essay
Trans Fat
diet. Trans fat which is mostly found in the form of hydrogenated oils also occurs in foods such as milk, cheese, butter, etc. It is very useful for
2 pages (500 words) Essay
Coconut Oil, although a saturated fat, is good for you
In contrast to other fats that are considered to be the main causes of different forms of diseases e.g. cardiovascular ailments, coconut oil can be considered as a healthy fat to consume. The healing and nutritional benefits of the said oil can even be considered to be
6 pages (1500 words) Essay
Oil
Countries go to war because there is the need to control oil resources which other nations might have. Most of the world’s most powerful nations have oil in their foreign policy agenda, and the Oil and Petroleum Exporting Countries (OPEC) have a strong hold of on the
1 pages (250 words) Essay
Fat
The number of diet clinics and doctors has evidently gone up. Different social circles all have different opinions on this matter. Radley Balko, author of what you eat is your business, says that one’s own weight
6 pages (1500 words) Essay
Oil
This can however be seen in mostly African developing countries. There are several counties that are not in peace due to the curse that is potentially oil related. It is supposed to be a blessing but it has gone to become a curse to most
3 pages (750 words) Essay
Fat Substitute
These fat substitutes may be categorized in three major classes including: Carbohydrate-based fat substitutes, Proteins and microparticulated proteins and Fat-based fat substitutes (AHA, 2013). Research suggests the positive impacts of fat
1 pages (250 words) Essay
Hire a pro to write
a paper under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
YOUR PRIZE:
Apply my DISCOUNT
Comments (0)
Click to create a comment