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See Chinese contents: GB/T 14949.11-2021 GB/T 14949.11-2021: Manganese ores -- Determination of carbon content -- Gravimetric method and infrared absorption method
This document specifies the determination of carbon content in manganese ores by gravimetric method and infrared absorption method. This document applies to the determination of carbon content in manganese ores. Determination range (mass fraction): 0.02% ~ 5.00% for Method I; 0.02% ~ 9.00% for Method II.
