1. principle
The specific gravity of the activated carbon is expressed by the mass g of the tightly packed activated carbon in a 100ml measuring cylinder.
2. steps
A. instrument
① Measuring cylinder, 100ml;
② Balance, sensitivity 0.01g;
③ Rubber hammer.
b. Operation method
① Weigh the mass M1 of 100ml empty measuring cylinder;
② Put the sample into the 100ml measuring cylinder gently, tap the bottom of the measuring cylinder gently with a rubber hammer, add the sample again and continue to knock (it is generally added in 5 times, 20ml each time), until the volume of the sample is exactly 100ml without any reduction, and call its mass m2.
C. Result calculation
ρ= (m2 -m1)-(m2 -m1)×w%/100
Formula:
ρ - specific gravity of activated carbon, g / ml;
M1 -- total mass of measuring cylinder, G;
M2 -- total mass of measuring cylinder and activated carbon, G;
W% - water content of activated carbon.