Control Chart Variables; Summary Report - Micromeritics Gemini VII 2390a Operator's Manual

Appendix C

Control Chart Variables

 y
i
---------
=
Mean
N
StdDev
StdDev
------------------ -
=
CoefVar
Mean
=
PlusNSig Mean
=
MinusNSig

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

Va
-------------------------------------------------------------------------------------------------
=
S
1PT
22414 cm
where
Pr =
Va =
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
C-40
2
 y Mean  
–
= ----------------------------------- -
N 1 –

+
n StdDev

–
Mean n StdDev
2
/g)
    CSA    
1 Pr – 6.023 10
3 18 2

STP 10 /m
nm
pressure closest to 0.3 of the relative pressure points designated for surface
area calculations.
volume corresponding to Pr
23

2
Gemini VII
239-42828-01 - Dec 2012