• Determination of iodine Value (IV) in Fats and Oils Using Applied Thermometric Titration

    Laboratory products

    Determination of iodine Value (IV) in Fats and Oils Using Applied Thermometric Titration

    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 acid. Metrohm Application Note AN-H-076 describes the procedure.

    The double bonds are reacted with an excess of a solution of iodine monochloride in glacial acetic acid (Wijs solution). Mercuric ions are added to hasten the reaction. After completion of the reaction, the excess iodine monochloride is decomposed to iodine by the addition of aqueous potassium iodide solution, which is then titrated with standard sodium thiosulphate solution.

    The titration procedure eliminates operator involvement in the determination. The Wijs’ solution is added, with a 300 seconds (5 minutes) wait programmed before 10 mL of 15% KI solution is added. The titration commences automatically.

    Thermometric titration has been successfully used to analyse foods ranging from dairy products, instant noodles, cheese, canned fish, dry snack food, sauces, soups, and more.

    For further information contact Metrohm UK Ltd.


    Digital Edition

    Lab Asia 31.6 Dec 2024

    December 2024

    Chromatography Articles - Sustainable chromatography: Embracing software for greener methods Mass Spectrometry & Spectroscopy Articles - Solving industry challenges for phosphorus containi...

    View all digital editions

    Events

    Smart Factory Expo 2025

    Jan 22 2025 Tokyo, Japan

    Instrumentation Live

    Jan 22 2025 Birmingham, UK

    SLAS 2025

    Jan 25 2025 San Diego, CA, USA

    Arab Health

    Jan 27 2025 Dubai, UAE

    Nano Tech 2025

    Jan 29 2025 Tokyo, Japan

    View all events

    Great Job...
    The latest issue will be with you shortly
    Sign up to Labmate for FREE.
    Register and get the eBulletin, a Monthly email packed with the latest Laboratory products, news and services. Join us and get the latest Laboratory information first.