Micromeritics ASAP 2460 Operator's Manual page 346

Appendix C
For fixed pore size tables (if selected), the following calculations are performed:
(1.) Average Fixed Pore Size (DF
DF
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
where INTERP(x) is the value interpolated from the function X = Dp
Y = VP
(3.) Incremental Pore Volume (VpF
VpF
where VpF
(4.) Cumulative Surface Area (SAF
SAF
where INTERP(x) is the value interpolated from the function X = Dp
Y = SA
(5.) Incremental Surface Area (SAF
SAF
where SAF
C-22
Dp + Dp
F F
j j +
----------------------------------- -
=
avg j 
2

= INTERP DpF
cum i 
, using an AKIMA semi-spline interpolation.
cum,i
= VpF – VpF
cum i 
i
= 0.
cum,0

= INTERP DpF
cum i 
.
cum,j
= SAF – SAF
cum i 
i
= 0.
cum,0
, A):
avg,j
1
3
, cm /g):
cum,i

i + 1
3
, cm /g):
i
cum
i 1 –
2
, m /g):
cum,i

i + 1
2
, m /g):
i
cum
i 1 –
ASAP 2460 Operator's Manual
and 
j+i
and 
j+i
246-42800-01 - Aug 2013