Micromeritics Gemini VII 2390a, Operator'S Manual

Page: 310 / 426

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