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Document Designation and Title Year Select Item(s) E248 Standard Test Method for Determination of Manganese in Manganese Ores by Pyrophosphate Complexed Permanganate Potentiometric Titrimetry 07 E248 Test Method for Determination of Manganese in Manganese Ores by Pyrophosphate Complexed Permanganate Potentiometric Titrimetry 02 E248 Standard Test Method for Manganese in Manganese Ores by Pyrophosphate Complexed Permanganate Potentiometric Method 97