Iodine Value Test #2 is a photograph by Andrew Lambert Photography/science Photo Library which was uploaded on October 3rd, 2018.
Iodine Value Test #2
Iodine value test. Nut (left) and sunflower (centre) oils one hour after having ethanolic iodine (right) added to them. This test determines the... more
Title
Iodine Value Test #2
Artist
Andrew Lambert Photography/science Photo Library
Medium
Photograph
Description
Iodine value test. Nut (left) and sunflower (centre) oils one hour after having ethanolic iodine (right) added to them. This test determines the degree of unsaturation of a fatty acid. The more unsaturated an oil is the more double bonds there are between carbon atoms. The double bonds react with iodine, which can be seen by a dilution in the iodine's colour. The nut oil is monounsaturated, that is it has one double bond, and so it is a brown colour. The sunflower oil is polyunsaturated, that is it has more than one double bond, and so it is yellow. Measuring the amount of iodine needed to make the iodine and oil solution retain the colour of the iodine, allows you to determine the degree of unsaturation.
Uploaded
October 3rd, 2018
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