Micromeritics ASAP 2460 - Page 365

ASAP 2460 Operator’s Manual Appendix C
246-42800-01 - Aug 2013 C-41
Mean Equivalent Pore Width (Å):
Micropore surface area (m
2
/g):
 is calculated by a polynomial approximation over the domain 0  ×  1:
where
b
1
= -0.57719 1652
b
2
= 0.98820 5891
b
3
= -0.89705 6937
b
4
= 0.91820 6857
b
5
= -0.75670 4078
b
6
= 0.48219 9394
b
7
= -0.19352 7818
b
8
= 0.03586 8343
and where
Equivalent Pore Diameter (Å):
D
mean
2
10
3
nm
3
Å
3

 E
0
-----------------------------------
1/3

3N 1+
3N
----------------


----------------------------------------------
=
SDA 1000 2.0 W
0

E
0
k
------
1/3

3N 1+
3N
----------------


=
 x 1+1 b
1
xb
2
x
2
b
3
x
3
b
4
x
4
b
5
x
5
b
6
x
6
b
7
x
7
b
8
x
8
x x 310
7–
+++++++++=
x 1+
3N 1+
3N
----------------


=
D
i
2
10
3
nm
3
Å
3

 E
0
--------------------------------



N
–
W
i
 W
0
ln–ln
--------------------------------------------
1/3N
=