Page 1 of 1: biochemistry-iodine number

suneet · Credits: 6820 My Scrapbook

please help me out in finding the formula of calculating iodine number .What exactly is iodine number??????????????

draditithegreat · Credits: 1247950 My Scrapbook

The reaction with iodine was long used for analyzing the number of double bonds, that is, the degree of saturation. Iodine solutions have a violet color. In the reaction with a double bond, one iodine molecule will lose its color.

In iodine number determinations (titration) the quantity of iodine is determined which will just still be decolored by the fat or oil. This provides a direct measure of the number of double bonds present in the sample

The iodine number in chemistry is the mass of iodine in grams that is consumed by 100 grams of a chemical substance

In a typical procedure the acid is treated with an excess of the Hanus solution which is a solution of iodobromine (BrI). Unreacted iodobromine is reacted with potassium iodide which converts it to iodine. The iodine concentration is then determined by titration with sodium thiosulfate.

TYPICAL IODINE #'s

Coconut oil
8 - 10

Butter
25 - 40

Beef tallow
30 - 45

Palm oil
37 - 54

Lard
45 - 70

Olive oil
75 - 95

Peanut oil
85 - 100

Cottonseed oil
100 - 117

Corn oil
115 - 130

Fish oils
120 - 180

Soybean oil
125 - 140

Safflower oil
130 - 140

Sunflower oil
130 - 145

Linseed oil
170 - 205

suneet · Credits: 6820 My Scrapbook

thanks draditithegreat i would like to learn from u

jgsharon · Credits: 9725 My Scrapbook

Hi Aditi,

According to the figures cited and the definition

given, shd it not be a measure of degree of

UNSATURATION???

Kindly clear this..........degree of saturation or

unsaturation??

		Sign In New User? Sign Up Sign in to access your control panel and messenger!
				TechZone \| SpiderNevi \| HowTo? \| Scrapbook!