Micromeritics Gemini VII 2390a Operator's Manual page 310

Appendix C
(6.) dV/dlog(D) pore volume (dV/dlog(D)
dDv/d
(7.) dA/dD pore area (dA/dD
dA/dD
(8.) dA/dlog(D) pore area [dA/dlog(D)
log
dA/d
For fixed pore size tables (if selected), the following calculations are performed:
(1.) Average Fixed Pore Size (DF
DF
avg
calculated for all intervals in the fixed pore size table.
For the intervals with between the Minimum BJH diameter and the Maximum BJH
diameter.
(2.) Cumulative Pore volume (VpF
VpF
CUM
where INTERP(x) is the value interpolated from the function X = Dp
VP
CUMJ
(3.) Incremental Pore Volume (VpF
VpF
I
where VpF
(4.) Cumulative Surface Area (SAF
SAF
CUM
where INTERP(x) is the value interpolated from the function X = Dp
C-16
Dp
 
  I
----------------
log = / log
D VP
 
I I
Dp
+ 1
I
2
, m
I
SA
I
------------------------------- -
=
–
I
Dp Dp
+ 1
I I
Dp
 
  I
----------------
= / log
D SA
 
I I
Dp
+ 1
I
+
Dp Dp
F F
----------------------------------- - + 1
= J J
2
J
 
=
INTERP DpF
+ 1
I
I
, using an AKIMA semi-spline interpolation.
= –
VpF VpF
CUM CUM
I 1 –
I
= 0.
CUM0
 
=
INTERP DpF
+ 1
I
I
3
, cm g):
I
/g-A):
2
, m /g]:
I
, A):
avgJ
3
, cm /g):
CUMI
3
, cm /g):
I
2
, m /g):
CUMI
Gemini VII
and Y =
J+1
and Y =
J+1
239-42828-01 - Dec 2012