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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