1.1 These test methods cover the determination of manganese in iron ores, concentrates, and agglomerates. The following two test methods are included: SectionsTest Method A (Pyrophosphate (Potentiometric))Test Method B (Periodate (Photometric))1.2 Test Method A covers the determination of manganese in the concentration range from 2.5 to 15.0 %. Test Method B covers the determinatio