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

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 %.

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.