ASTM E314-10 Test method for Determination of Manganese in Iron Ores by Pyrophosphate (Potentiometric) and Periodate (Photometric) Techniques

ASTM E314-10 Test method for Determination of Manganese in Iron Ores by Pyrophosphate (Potentiometric) and Periodate (Photometric) Techniques

ASTM E314-10 test method is intended to be used for compliance with compositional specifications for manganese content in iron ores, concentrates, and agglomerates.

    Scope:

    This test method contains two test methods for the determination of manganese in iron ores, concentrates, and agglomerates. Test Method A covers the determination of manganese in the concentration range from 2.5 % to 15.0 %. Test Method B covers the determination of manganese in the concentration range of 0.01 % to 5.00 %.

    Test Sections
    Test Method A (Pyrophosphate (Potentiometric))8-15
    Test Method B (Periodate (Photometric))16-22

    Result:

    Test Method A

    Calculate the percentage of manganese as follows:

    Where,

    A = milliliters of KMnO4 solution required for the titration of the sample,

    B = milliliters of KMnO4 solution required for the titration of the blank,

    C = normality of the KMnO4 solution, and

    D = grams of sample used.

    Test Method B

    Convert the absorbance to milligrams of manganese using the calibration curve. Calculate the percentage of manganese in the sample as follows:

    where:

    A = milligrams of manganese,

    B = milliliters of the sample solution,

    C = milliliters of aliquot taken for color development, andD = grams of sample used.

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