Micromeritics TriStar II 3020 - Control Chart Variables; Summary Report

Appendix C TriStar II 3020
C-40 302-42828-01 - Dec 2012
Control Chart Variables
Mean
 y
i
N
---------
=
StdDev
 yMean–
2
N 1–
------------------------------------=
CoefVar
StdDev
Mean
-------------------
=
PlusNSig Mean n StdDev+=
MinusNSig Mean n StdDev–=
Summary Report
The following calculations and the results of previous calculations (as noted) are used to generate the
summary report:
a.) Single-point Surface Area (m
2
/g)
S
1PT
Va 1 Pr–CSA 6.023 10
23

22414 cm
3
STP 10
18
nm
2
/m
2

-------------------------------------------------------------------------------------------------
=
where
Pr = pressure closest to 0.3 of the relative pressure points designated for surface
area calculations.
Va = volume corresponding to Pr
b.) Multipoint Surface Area
See BET Surface Area Calculations
c.) Langmuir Surface Area
See Langmuir Surface Area Calculations
d.) t-Plot Micropore Surface Area
See t-Plot calculations
e.) t-Plot External Surface Area
See t-Plot calculations
f.) BJH Cumulative Adsorption