ASAP 2460 Operator’s Manual
Appendix C
246-42800-01 - Aug 2013
C-13
Alpha-S Method
The alpha-S curve is calculated from the reference isotherm by dividing each quantity adsorbed by the
quantity adsorbed at 0.4 relative pressure.
where
Q
0.4
is found by linear interpolation.
A least-squares analysis fit is performed on the (
α
i
,
Q
ads,i
) data pairs where
α
i
is the independent vari-
able and
Q
ads,i
is the dependent variable. The following are calculated:
a.) Slope (
S
cm³/g STP)
b.) Y-intercept (
Q
0
cm³/g STP)
c.) Error of the slope (cm³/g STP)
d.) Error of the Y-intercept (cm³/g STP)
e.) Correlation coefficient
Surface area is calculated as:
Pore size is calculated as:
where
V
mol
is liquid molar volume from the fluid property information.
a
i
Q
i
Q
0.4
----------
=
A
A
ref
S
Q
0.4
-------------
=
Q
0
V
mol
22414
cm
3
STP
-------------------------------------
Содержание ASAP 2460
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Страница 12: ...Table of Contents ASAP 2460 Operator s Manual viii 246 42800 01 Nov 2013...
Страница 30: ...Using the Software ASAP 2460 Operator s Manual 1 18 246 42800 01 Aug 2013...
Страница 93: ...ASAP 2460 Operator s Manual Generating Graph Overlays 246 42800 01 Aug 2013 2 63...
Страница 94: ...Generating Graph Overlays ASAP 2460 Operator s Manual 2 64 246 42800 01 Aug 2013...
Страница 202: ...Service Test ASAP 2460 Operator s Manual 4 36 246 42800 01 Aug 2013...
Страница 230: ...Report Examples 2460 Operator s Manual 5 28 246 42800 01 Aug 2013 Isotherm Linear Plot...
Страница 231: ...2460 Operator s Manual Report Examples 246 42800 01 Aug 2013 5 29 BET Surface Area Report...
Страница 232: ...Report Examples 2460 Operator s Manual 5 30 246 42800 01 Aug 2013 BET Surface Area Plot...
Страница 233: ...2460 Operator s Manual Report Examples 246 42800 01 Aug 2013 5 31 t Plot Report...
Страница 234: ...Report Examples 2460 Operator s Manual 5 32 246 42800 01 Aug 2013 BJH Adsorption Cumulative Pore Volume...
Страница 235: ...2460 Operator s Manual Report Examples 246 42800 01 Aug 2013 5 33 BJH Desorption Cumulative Pore Volume...
Страница 236: ...Report Examples 2460 Operator s Manual 5 34 246 42800 01 Aug 2013...
Страница 242: ...Service Test Mode 2460 Operator s Manual 6 6 246 42800 01 Aug 2013...
Страница 270: ...Calibrating the System ASAP 2460 Operator s Manual 7 28 246 42800 01 Aug 2013...
Страница 276: ...Ordering Information ASAP 2460 Operator s Manual 8 6 246 42800 01 Aug 2013...
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Страница 374: ...Appendix C ASAP 2460 Operator s Manual C 50 246 42800 01 Aug 2013...
Страница 398: ...Appendix F ASAP 2460 Operator s Manual F 18 246 42800 01 Aug 2013...
Страница 412: ...Index ASAP 2460 Operator s Manual Index 8 246 42800 01 Aug 2013...
Страница 413: ...ASAP 2460 Operator s Manual Appendix G Aug 2013 SVP 1 SVP Smart VacPrep Operator Manual...
Страница 414: ...Appendix G ASAP 2460 Operator s Manual SVP 2 Aug 2013...
Страница 415: ...OPERATOR MANUAL Smart VacPrep Operator Manual Nov 2013 SMART VACPREP INTELLIGENT VACUUM SAMPLE PREPARATION SYSTEM...
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