Micromeritics ASAP 2460 User Manual

ASAP 2460 Operator’s Manual Appendix C
246-42800-01 - Aug 2013 C-27
IP = interaction parameter (erg-cm
4
) from the Horvath-Kawazoe Report Options
window
K = Avogadro’s number (6.023 × 10
23
mol
-1
)
L = pore width (nucleus to nucleus) (Å)
P = equilibrium pressure
Po = saturation pressure
R = gas constant (8.31441 × 10
7
erg/mol K)
T = analysis bath temperature (K), from an entered or calculated value on the Po
and Temperature Options window
where:
Z
S
= sample equilibrium diameter at zero interaction energy (Å) from the
Horvath-Kawazoe Physical Properties window
Z
A
= zero interaction energy diameter from the Horvath-Kawazoe Physical
Properties window
Cylinder Pore Geometry (Saito/Foley)
When you use the Saito-Foley
10
method, the following equation is solved for each value of P. The
value of L is determined when the solved-for relative pressure is within 0.1% of the collected absolute
pressure.
where
10
32
= the number of cm
4
that are equal to Å
4

k
=

k
=
d
0
=
where:
D
A
= molecular diameter (Å) from the Horvath-Kawazoe Physical Proper-
ties window
D
S
= diameter of sample atom (Å) from the Horvath-Kawazoe Physical
Properties window
IP = interaction parameter (10
-43
erg-cm
4
) from the Horvath-Kawazoe Report
Options window
K = Avogadro’s number (6.023 × 10
23
)
L = pore width (nucleus to nucleus) (Å)
P
Po
-------


ln
3
4
---
K
RT
-------
IP 10
32

d
0
4
-----------------------

1
k 1+
------------
1
d
0
r
p
----
–


2k
21
32
------

k
d
0
r
p
----


10

k
d
0
r
p
----


4
–




k0=


=
1.5– k–
k
--------------------


2

k1–
,
0
1.0=
4.5– k–
k
--------------------


2

k1–
,
0
1.0=
D
A
D
S
+
2
---------------------

Micromeritics ASAP 2460 Specifications

General

Brand	Micromeritics
Model	ASAP 2460
Category	Measuring Instruments
Language	English