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    Question

    Reichert-Meissl (RM) number is defined as:

    A The number of mg of KOH required to completely neutralize free fatty acids present in one-gram fat or oil. Correct Answer Incorrect Answer
    B The number of ml 0.1 N KOH required to completely neutralize the soluble volatile fatty acids distilled from 5 g fat. Correct Answer Incorrect Answer
    C mg of KOH required to hydrolyse one gram of fat or oil. Correct Answer Incorrect Answer
    D grams of iodine absorbed by 100 g of fat or oil. Correct Answer Incorrect Answer

    Solution

    ·        Measures water-soluble volatile fatty acids (C4-C12) content. ·        Procedure: Steam distillation of 5g fat → titration of distillate with 0.1N KOH. ·        Significance: Butterfat has RM 25-30; coconut oil 6-8; vegetable oils <1.

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