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  2. Iodine value - Wikipedia

    en.wikipedia.org/wiki/Iodine_value

    Measurement of iodine value with the official method is time-consuming (incubation time of 30 min with Wijs solution) and uses hazardous reagents and solvents. [3] Several non-wet methods have been proposed for determining the iodine value. For example, IV of pure fatty acids and acylglycerols can be theoretically calculated as follows: [11]

  3. Iodine - Wikipedia

    en.wikipedia.org/wiki/Iodine

    The iodine value is the mass of iodine in grams that is consumed by 100 grams of a chemical substance typically fats or oils. Iodine numbers are often used to determine the amount of unsaturation in fatty acids. This unsaturation is in the form of double bonds, which react with iodine compounds.

  4. Acid value - Wikipedia

    en.wikipedia.org/wiki/Acid_value

    In chemistry, acid value (AV, acid number, neutralization number or acidity) is a number used to quantify the acidity of a given chemical substance. It is the quantity of base (usually potassium hydroxide (KOH)), expressed as milligrams of KOH required to neutralize the acidic constituents in 1 gram of a sample.

  5. Karl Fischer titration - Wikipedia

    en.wikipedia.org/wiki/Karl_Fischer_titration

    This elementary reaction consumes exactly one molar equivalent of water vs. iodine. Iodine is added to the solution until it is present in excess, marking the end point of the titration, which can be detected by potentiometry. The reaction is run in an alcohol solution containing a base, which consumes the sulfur trioxide and hydroiodic acid ...

  6. Bromine number - Wikipedia

    en.wikipedia.org/wiki/Bromine_number

    The bromine number is similar to the iodine number, which is a similar technique used in evaluating the unsaturation of fats and fatty acids. Iodine is less reactive toward the tri- and tetra-substituted double bonds, [2] found in petroleum-derived samples. The C=C double bonds in fats and fatty acids are exclusively disubstituted.

  7. Iodine in biology - Wikipedia

    en.wikipedia.org/wiki/Iodine_in_biology

    The EFSA reviewed the same safety question and set its adult UL at 600 μg/day, which is a bit more than half the U.S. value. [51] Notably, Japan reduced its adult iodine UL from 3,000 to 2,200 μg/day in 2010, but then increased it back to 3,000 μg/day in 2015. [52]

  8. Saponification value - Wikipedia

    en.wikipedia.org/wiki/Saponification_value

    Example of saponification reaction of a triglyceride molecule (left) with potassium hydroxide (KOH) yielding glycerol (purple) and salts of fatty acids ().. Saponification value or saponification number (SV or SN) represents the number of milligrams of potassium hydroxide (KOH) or sodium hydroxide (NaOH) required to saponify one gram of fat under the conditions specified.

  9. Hydroxyl value - Wikipedia

    en.wikipedia.org/wiki/Hydroxyl_value

    The hydroxyl value can be calculated using the following equation. Note that a chemical substance may also have a measurable acid value affecting the measured endpoint of the titration. The acid value ( AV ) of the substance, determined in a separate experiment, enters into this equation as a correction factor in the calculation of the hydroxyl ...