determination of iodine value of fats and oils pdf

Determination Of Iodine Value Of Fats And Oils Pdf

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Iodine value , also called Iodine Number , 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 grams of the oil, fat, or wax. Saturated oils, fats, and waxes take up no iodine; therefore their iodine value is zero; but unsaturated oils, fats, and waxes take up iodine.

Background : Determination of Iodine value IV along with factors like acid value, peroxide value, saponification value, solid fat index, refraction value, and trans fatty acid content is an important factor in controlling edible oils and fats. In unsaturated fatty acids, IV is a measure of the degree of unsaturation. The range of figures for IV of the various groups of oils and fats are therefore different.

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. IV is a measure of the number of double bonds in the unsaturated fatty acids in one gram of oil. The analytical methodology of its evaluation includes the use of rather health dangerous reagents, and for that reason is mostly avoided by laboratory analysts.

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Iodine value

Total unsaturation of conjugated systems may be measured in accordance with Test Method D The values given in parentheses are for information only. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Multi-user access to over 3, medical device standards, regulations, expert commentaries and other documents. Worldwide Standards We can source any standard from anywhere in the world. Learn more about the cookies we use and how to change your settings. Online Tools.

A rapid and practical method for determining the iodine value IV of edible oils or fats with an FTIR spectrometer combined with a quartz cuvette was reported. The effect of unsaturated fatty acid composition of oil and fat on the FTIR spectra and the predicted IV was discussed. The proposed method was suitable for determining the IV of edible oils and fats in which almost all the olefinic bonds were in the cis configuration. If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using Copyright Clearance Center. Go to our Instructions for using Copyright Clearance Center page for details. Authors contributing to RSC publications journal articles, books or book chapters do not need to formally request permission to reproduce material contained in this article provided that the correct acknowledgement is given with the reproduced material. If the material has been adapted instead of reproduced from the original RSC publication "Reproduced from" can be substituted with "Adapted from".

This is a preview of subscription content, access via your institution. Delaby, R. Croxford, J.


Дэвид в опасности… или того хуже. Быть может, уже поздно. Я сожалею о Дэвиде Беккере. Она изучала записку. Хейл ее даже не подписал, просто напечатал свое имя внизу: Грег Хейл. Он все рассказал, нажал клавишу PRINT и застрелился.

После этого сюда полезут все, кому не лень. Каждый бит информации АНБ станет общественным достоянием. Фонтейн внимательно изучал ВР, глаза его горели. Бринкерхофф слабо вскрикнул: - Этот червь откроет наш банк данных всему миру. - Для Танкадо это детская забава, - бросил Джабба.

И, что, на взгляд Хейла, было еще хуже, влюбилась в университетского профессора, который к тому же зарабатывал сущие гроши. Очень жаль, если она истратит свой превосходный генетический заряд, произведя потомство от этого выродка, - а ведь могла бы предпочесть его, Грега. У нас были бы красивые дети, - подумал .

Джабба рассмеялся. - Не кажется ли тебе, что это звучит как запоздалое эхо. Она тоже засмеялась. - Выслушай меня, Мидж. Направь мне официальный запрос.

Будем охранять нашу крепость. Желаю веселого уик-энда. Чатрукьян заколебался. - Коммандер, мне действительно кажется, что нужно проверить… - Фил, - сказал Стратмор чуть более строго, - ТРАНСТЕКСТ в полном порядке. Если твоя проверка выявила нечто необычное, то лишь потому, что это сделали мы .

Сьюзан ощутила угрызения совести. - Я тоже хватила через край. Извините. Дэвид - это отличная кандидатура. Стратмор отрешенно кивнул: - Он вернется сегодня вечером.

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