The iodine value is a measure of the relative degree of unsaturation in oil components, as determined by the uptake of halogen. Because the melting point and oxidative stability are related to the ...

iodine value is used as a basis for further calculations, the accuracy of the determination becomes very impor- tant, since a diffcrencc of one per cent. in iodine value may make a difference of several per cent. in the calcu- lated proportion of one …

1: From the photoelectron spectrum Potts and Price, 1971, Higginson, Lloyd, et al., 1973; adiabatic potential established by temperature variation.The same method yields 9.953 eV for the ionization potential to 2 Π 1/2g (v=0). Neither result agrees with the values obtained by Venkateswarlu, 1970 from Rydberg series, i.e. 9.400 and 10.03 eV. The discrepancy …

Introduction. Iodine is a trace element that is naturally present in some foods, is added to some types of salt, and is available as a dietary supplement. Iodine is an essential …

Determination of Iodine Value in Oils and Fats. The most important application of the iodine number test is to determine the amount of unsaturation contained in the fatty acids that make up oils. This unsaturation is in the form of double bonds which react with iodine compounds. The higher the iodine value, the greater the unsaturation present ...

Iodine Value. The iodine value is a measure of the relative degree of unsaturation in oil components, as determined by the uptake of halogen. From: Encyclopedia of Food Sciences and Nutrition (Second Edition), 2003 Related terms:

Iodine value or number is the number of grams of iodine consumed by 100g of fat. A higher iodine value indicates a higher degree of unsaturation. unsaturated fatty acids . Principle: Fatty acids react with a halogen [ iodine] resulting in the addition of the halogen at the C=C double bond site. In this reaction, iodine monochloride reacts with ...

The study found that even mild iodine deficiency in pregnancy had long-term cognitive effects. For example, children whose parents had iodine deficiency during pregnancy had reduced scores in reading, spelling, and grammar, independent of other factors known to impact learning. ... Values lower than 20 micrograms per liter suggest …

Iodine value (IV) is a significant parameter to illustrate the quality of edible oil. In this study, three portable spectroscopy devices were employed to determine IV in mixed edible oil system, a ...

Terms in this set (30) Iodine value. Measure of degree of UNsaturation (double bonds) Iodine value is expressed as: grams of iodine absorbed by 100 gm sample. gm iodine/100 gm sample. Relationship between unsaturation and iodine value: More unsaturation = less iodine remaining (lower iodine value) The more double bonds = lower iodine value.

A new calculation method for the determination of iodine value (IV) from measurements of fatty acid methyl esters is proposed. The method is based on the quantitative determination of fatty acid methyl esters of vegetable oils by capillary gas chromatography.

The iodine value is a measure of the unsaturation of fats and oils and is expressed in terms of the number of centigrams of iodine absorbed per gram of sample. 3. Apparatus and Reagents 3.1 Glass-Stoppered …

The iodine value ranges differ for various substances: Animal fats typically have an iodine value between 30 and 70. Non-drying oils have iodine values ranging from 80 to 110. Semi-drying oils exhibit iodine values ranging from 80 to 140. Drying oils have higher iodine values, ranging from 125 to 200. Waxes generally possess very small …

Iodine Value. The oil (IV 127–165) is also very rich in natural antioxidants, making this highly stable oil very resistant to oxidation and useful as a paint oil. ... The basic definitions and terminology of specific surface area and solid density are given. Information about instruments and measuring methods is provided. 1143, Test for ...

a measure of the unsaturation of a substance (as an oil or fat) expressed as the number of grams of iodine or equivalent halogen absorbed by 100 … See the full definition Menu Toggle

Iodine value, in analytical chemistry, measure of the degree of unsaturation of an oil, fat, or wax; the amount of iodine, in grams, that is taken up by 100 grams of the oil, fat, or wax. Saturated oils, fats, and waxes take up no iodine, and therefore their iodine value is zero, …

Understanding how iodine in soap making works helps you in the quest for a better bar of soap. The Iodine Value indicates the level of unsaturated fats or oils. The INS number combines the iodine level and SAP value to determine physical qualities of a soap bar. The ideal INS is 160, but this is just a historical guideline.

Iodine value (IV) is a measure of the total number of unsaturated double bonds present in fats and oils. It is normally expressed in terms of "number of grams of iodine that will react with the double bonds in 100 grams of fats or oils". It must be noted that a high IV value in oil consists of a greater number of double bonds than a low IV oil.

iodine number: [noun] a measure of the unsaturation of a substance (as an oil or fat) expressed as the number of grams of iodine or equivalent halogen absorbed by 100 grams of the substance.

Iodine value (IV) is a measure of the total number of double bonds present in fats and oils. It is expressed as the «number of grams of iodine that will react with the double bonds in 100 grams of fats or oils». The determination is conducted by dissolving a weighed sample in a non-polar solvent such as cyclohexane, then adding glacial acetic …

This is usually expressed as the iodine value, or number, which reflects the analytical method used to determine the degree of unsaturation of the oil and represents the …

The radioactive isotope iodine-131 is sometimes used to treat cancerous thyroid glands. Biological role. Iodine is an essential element for humans, who need a daily intake of about 0.1 milligrams of iodide. Our bodies contain up to 20 milligrams, mainly in the thyroid gland.

Quality indices often describe components in fats and oils arising from processing, storage, and naturally occurring, nonfatty materials. Common structure indices are the iodine value (IV), the saponification value, and the hydroxyl value.

Iodine number represents the degree of unsaturation of fatty acids based on the alkyl double bond present in biodiesel. It depends on the feedstock used (Mittelbach, 1996 ). It is the quantity of iodine that is required to saturate the fatty acids in 100 g of a biodiesel sample ( Knothe, 2005 ). A high iodine value corresponds to a high degree ...

The iodine number is an important sum parameter for assessing the quality of edible fats and oils. It provides quantitative information about the presence of unsaturated fats and oils. The higher the amount of …

The vegetable oils were analyzed for their iodine values and the following results were obtained: For groundnut oil, the iodine values were found to be 86.00 g I2/100g, olive oil 81.01 g I2/100g ...

The iodine value is a measure of the unsaturation present in fats and oils, particularly the degree of unsaturation of fatty acids within them. The quantity of iodine that reacts with 100 grams of fat or oil determines the iodine value. Higher the iodine value, the higher the concentration of unsaturated fatty acids in the sample.

The iodine value (IV) is still one of the most commonly applied indices in fatty acid chemistry. Its introduction in 1884 was a milestone in analysing fats and oils as well as …

The iodine-replete healthy adult has about 15–20 mg of iodine, 70%–80% of which is contained in the thyroid [ 6 ]. Median urinary iodine concentrations of 100–199 mcg/L in children and adults, 150–249 mcg/L in pregnant women and >100 mcg/L in lactating women indicate iodine intakes are adequate [ 3 ].

F Said, M M Amer, A K Sayed Ahmed, A A Said, Method for the determination of iodine value, Journal of Pharmacy and Pharmacology, Volume 16, Issue 3, March 1964, Pages 210–211, ... To purchase short-term access, please sign in to your personal account above. Don't already have a personal account? Register. Method for …