ASTM E298-08 Standard Test Methods for Assay of Organic Peroxides

ASTM E298–08 test method covers the procedures for assaying organic peroxides to determine if they are suitable for their intended use. Organic peroxides use as chemical intermediates, catalysts, and initiators. The apparatus used is Iodine Flasks of 250-mL with stoppers.

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    Scope:

    ASTM E298–08 test method provides an assay of organic peroxides. Two test procedures are performed, depending upon the ease of reduction.

    Test Procedure:

    Test MethodSections
    SODIUM IODIDE, ROOM TEMPERATURE TESTMETHOD5-13
    SODIUM IODIDE, 60°C TEST METHOD14-22

    Results:

    Calculate the assay as follows:

    Where:

    A = mL of Na2S2O3 solution required for titration of the sample,

    B = mL of Na2S2O3 solution required for titration of the blank,

    N = meq/mL (N) of the Na2S2O3 solution,

    C = number of peroxide groups in the molecule,

    M = molecular weight of the compound, and

    W = grams of sample used.

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