This standard specifies the reagents and instruments required for the determination of the specific surface area of coal-based granular activated carbon, the determination steps and the treatment of the measurement results. This standard applies to the determination of the specific surface area of coal-based granular activated carbon.
GB/T 7702.21-1997 history
2008GB/T 7702.20-2008 Test method for granular activated carbon from coal.Determination of pore volume and specific surface area
1997GB/T 7702.21-1997 Standard test method for granular activated carbon from coal--Determination of specific surface area
GB/T 7702.21-1997 Standard test method for granular activated carbon from coal--Determination of specific surface area was changed to GB/T 7702.20-2008 Test method for granular activated carbon from coal.Determination of pore volume and specific surface area.