T-Plot - Micromeritics Gemini VII 2390a Operator's Manual

Appendix C

t-Plot

For each point designated for t-Plot
th
Thickness for the I
 -------------------- -
=
t HP1
I ln
or
--------------------------------------------
=
t
I
HJP2
or

=
t STSA1 P
I
where:
t =
I
HP1 =
HP2 =
HP3 =
HJP1 =
HJP2 =
HJP3 =
STSA1 =
STSA2 =
STSA3 =
P =
rel
I
A least-squares analysis fit is performed on the (t
and Nads is the dependent variable. Only the values of t
I
maximum thickness, are used. The following are calculated:
a.) Slope (S cm
b.) Y-intercept (Y
c.) Error of the slope (S
d.) Error of the Y-intercept (YI
e.) Correlation coefficient
C-8
4
calculations, the following calculations are done:
point (Å):
HP3
HP2
 
P
rel
I
HJP3
HJP1
 
– log
P
rel
I
2
  
+ +
STSA2 P STSA3
rel rel
1 1
th
thickness for I point
Halsey parameter #1
Halsey parameter #2
Halsey parameter #3
Harkins and Jura parameter #1
Harkins and Jura parameter #2
Harkins and Jura parameter #3
statistical thickness surface area parameter #1
statistical thickness surface area parameter #2
statistical thickness surface area parameter #3
relative pressure for the Ith point (mmHg)
3
/g-Å STP)
3
cm /g STP)
INT
3
cm /g-Å STP)
ERR
3
cm /g STP)
ERR
5
(Halsey )
(Harkins and Jura
, N ) data pairs where t
I ads
I
between t and t
I MIN
Gemini VII
6
)
is the independent variable
I
, the minimum and
MAX
239-42828-01 - Dec 2012