How do you calculate iodine value?

Why is iodine value determined?

Principle of the test

The most important application of the iodine value is to determine the amount of unsaturation contained in fatty acids. This unsaturation is in the form of double bonds which react with iodine compounds. The higher the iodine value, the more unsaturated fatty acid bonds are present in a fat.

Is high iodine value good for health?

The greater the iodine value, the more unsaturation and the higher the susceptibility to oxidation.

What is saponification value and iodine?

Saponification value (SV), iodine value (IV), acidity (AN), and peroxide value (PV) are the most commonly used parameters in characterizing the quality of oils and fats. These parameters are widely used to determine purity (SV), number of unsaturated compounds (IV) and free fatty-acid content (acidity).

What is iodine value Slideshare?

IODINE VALUE The iodine value of an oil/fat is the number of grams of iodine absorbed by 100g of the oil/fat, when determined by using Wijs solution. Analytical importance  The most important application of the iodine value is to determine the amount of unsaturation contained in fatty acids.

What is the normal range of iodine value?

3.2. 5.2 The Iodine Value Measures the Unsaturation in Oils and Fats
Oil/Fat Type Iodine Value
Peanut oil 86–107
Cottonseed oil 100–115
Maize oil (corn) 107–135
Sesame oil 104–120

Which oil has highest iodine value?

Thus, the higher the iodine value, the more unsaturations are present in the fat.
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Iodine values of various oils and fats.
Fat Iodine value (gI/ 100g)
Cod liver oil 148 – 183
Corn oil 107 – 128
Cottonseed oil 100 – 115
Fish oil 190 – 205

What is acetyl value?

Definition of acetyl value

: a measure of the free hydroxyl groups in a substance (as a fat or oil) as determined by acetylation, being the number of milligrams of potassium hydroxide required for neutralization of the acetic acid formed by hydrolysis of one gram of the acetylated substance.

What does a low iodine value mean?

(Unsaturated compounds contain molecules with double or triple bonds, which are very reactive toward iodine.) … The more iodine is attached, the higher is the iodine value, and the more reactive, less stable, softer, and more susceptible to oxidation and rancidification is the oil, fat, or wax.

Which have a higher iodine numbers fats or oil?

In fatty acids, unsaturation occurs mainly as double bonds which are very reactive towards halogens, the iodine in this case. Thus, the higher the iodine value, the more unsaturations are present in the fat.
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Iodine Value.
Fat Iodine Value (g/100g)
Canola Oil 110-126
Coconut Oil 6-11
Fish oil 190-205
Linseed Oil 170-204
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Jun 19, 2021

What is Polanski number?

The Polenske value (also known as the Polenske number) is a value determined when examining fat. It is an indicator of how much volatile fatty acid can be extracted from fat through saponification.

Is high iodine value in oil good or bad?

Hence, the observed higher iodine value in the locally made oils indicated that they are likely to be healthier for consumption. Studies have recommended to switch from saturated to unsaturated fats because of the risk of cardiovascular disease associated with high consumption of saturated fatty-acids [22–25].

What reduces the value of iodine in oil?

Traditional methods of lowering the iodine value and acid value of vegetable or animal oil for mixing in fuel oils require the conversion of double bonds contained in unsaturated fatty acids to single bonds through catalytic hydrogenation.

Is unsaturated fat good?

Unsaturated fats, which are liquid at room temperature, are considered beneficial fats because they can improve blood cholesterol levels, ease inflammation, stabilize heart rhythms, and play a number of other beneficial roles.

Does coconut oil contain iodine?

The iodine number of coconut oil typically ranges from 7.5- 10.5, that of olive oil from 74-94 and of sunflower oil from 125- 136.

Does temperature affect iodine value?

The iodine value (IV) is a measure of the unsaturation of fatty acids. It is characteristic for a given fat and can be used for its identification. During the heat treatment a slight decrease of iodine value was observed for all oils after 30h at 180 °C of heating.

What is acid value of fat?

The acid value is defined as the number of milligrams of Potassium hydroxide required to neutralize the free fatty acids present in one gram of fat. It is a relative measure of rancidity as free fatty acids are normally formed during decomposition of triglycerides.

What vegetables are high in iodine?

They are present in some plant foods including soy, and cruciferous vegetables such as cabbage, broccoli, cauliflower and brussels sprouts. For most people in the United States who get adequate amounts of iodine, eating reasonable amounts of foods containing goitrogens is not a concern.