Bet Surface Area - Micromeritics ASAP 2020 Confirm Operator's Manual

ASAP 2020 Confirm

BET Surface Area

For each point designated for surface area calculations, the BET
as follows:
B
1
where B is in units of g/cm
I
A least-squares fit is performed on the (P
independent variable and B
a. Slope (S g/cm
b. Y-intercept (Y
c. Error of the slope (S
d. Error of the y-intercept (YI
e. Correlation coefficient (Cc)
Using the results of the above calculations, the following can be calculated:
BET Surface Area (m
SA
BET
where
CSA
BET C value:
C =
1. Brunauer, S.; Emmett, P.H.; and Teller, E., J. Am. Chem. Soc. 60, 309 (1938).
C-8
P
rel
--------------------------------------------- -
=
1
  N 
1.0 P –
rel ads
1 1
3 STP.
is the dependent variable. The following are calculated:
I
3 STP)
g/cm 3 STP)
INT
g/cm
ERR
2 /g):
CSA
-------------------------------------------------------------------------------------------------------------------- -
=
3

22414 cm STP
= analysis gas molecular cross-sectional area (nm
Adsorptive Properties dialog box
S + Y
INT
------------------ -
Y
INT
,B ) designated pairs where P
rel I I
3 STP)
g/cm 3 STP)
ERR
23
   
6.023 10
18 2 2
     
10 nm /m S
Appendix C
1 transformation is calculated
is the
rel I

+ Y
INT
2
), user-entered on the
202-42811-01 - Mar 2011