Iodine value test
Bildnummer 11672774
| Iodine value test. Nut (left) and sunflower (centre) oils several hours 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 quickly turned a brown colour. The sunflower oil is polyunsaturated,that is it has more than one double bond. At first it remained yellow,but eventually it also turned brown. 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 | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Andrew Lambert Photography |
| Bildgröße: | 4917 px × 3626 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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