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See Chinese contents: GB/T 1509-2016 GB/T 1509-2016: Manganese ores -- Determination of silicon content -- Perchloric acid dehydration gravimetric method
This standard specifies the determination of silicon content in manganese ore by the perchloric acid dehydration gravimetric method. This standard applies to the determination of silicon content in fluorine-free manganese ores and manganese concentrates; the measurement range (mass fraction): 0.50% to 20.00%.
