Additional Calculations - Micromeritics ASAP 2020 Confirm Operator's Manual

Appendix C

Additional Calculations

Based on the previous calculations, the following can be calculated:
Adjusted Pore Width (Å):
(Shell to Shell)
AL
Cumulative Pore Volume (cm
V
CUM
where
D
dV/dD Pore Volume (cm
dV
-------- -
dD
Median Pore Width (Å):
V
HALF
D
MED
where
V
CUM
N
V
HALF
V
L
V
G
D
L
D
G
202-42811-01 - Mar 2011
= L – DS
I I
3
/g):

= V D
I
I
= density conversion factor (cm
Properties dialog box
3
/g-Å):
V – V
CUM CUM
------------------------------------- -
=
I I 1 –
AL – AL
I I I 1 –
V
CUM
--------------
=
N
2
  
= 10 log D + log
L
= total cumulative pore volume (V
Horvath-Kawazoe calculations
= 50% of total cumulative pore volume
= cumulative pore volume (V
= cumulative pore volume (V
= pore width (L
= pore width (L
3
liquid/cm
log
      --------------------------------------------- -
V – log V
HALF L
log
CUM
) for first point less than V
CUM
I
) for first point greater than V
CUM
I
) that corresponds to V
I
) that corresponds to V
I
ASAP 2020 Confirm
3
STP) on the Adsorptive
   
D – log D
G L
   
V – log V
G L
) for points designated for
I
HALF
L
G
HALF
C-27