Micromeritics TriStar II 3020 - Page 339

D
MEAN
2
10
3
nm
3
/A
3
 E
0
-----------------------------
1/3

3N 1+
3N
----------------


-----------------------------------------
=
SDA 1000 2.0 W
0

E
0
k
------
1/3

3N 1+
3N
----------------


=
TriStar II 3020 Appendix C
302-42828-01 - Dec 2012 C-31
Maximum Differential Pore Volume (cm
3
/g-Å):
This value is also known as frequency of the mode
12
Mean Equivalent Pore Width (Å):
Micropore surface area (m
2
/g):
 is ca
lculated by a polynomial approximation over the domain 0  x  1 as follows:
(x+1) =
1+b
1
x + b
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) |  3 x 10
-7
x 1+
3N 1+
3N
----------------


=
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
dV
dD
mode
-------------------
Max 0.5 3N 1+ W
o

3N 1+
3N
----------------
1/3N

 E
0
10
3
nm
3
/A
3
-----------------------------

1/3
3N 1+
3N
----------------
–


exp=