SLIDE 1
Disclaimer
3000 volts can kill Protect your eyes 230 Volts can kill Mass spectrometers can cause pain Mental pain! Hot soldering irons can burn
A Most Capricious Instrument 95 years of tearing our hair out. - - PowerPoint PPT Presentation
A Most Capricious Instrument 95 years of tearing our hair out. - - PowerPoint PPT Presentation
A Most Capricious Instrument 95 years of tearing our hair out. Disclaimer Mass spectrometers can cause pain Hot soldering irons can burn 230 Volts can kill Protect your eyes Mental pain! 3000 volts can kill In the beginning F.W. Aston
SLIDE 2
SLIDE 3
In the beginning
SLIDE 4
F.W. Aston
SLIDE 5
Dual Inlet
602 with dual inlet
SLIDE 6
Dual Inlet Analysis
SLIDE 7
Dual Inlet
SLIDE 8
Trapping Boxes
120ml/min Helium 10-6 mbar
LN2
SLIDE 9
1st Continuous Flow
To m/s Crimp To atmosphere From EA
SLIDE 10
2nd Continuous Flow
EA
To m/s
Interface
Split Reduction Combustion Seperation Water removal
SLIDE 11
Early EA-IRMS
- Reference1
- Reference2
- Sample1
- Sample2
- Sample3
- Sample4
- Sample5
- Sample6
- Sample7
- Reference3
- Reference4
SLIDE 12
Along came the reference gas
By inserting a second capillary with a reference gas into the open split a reference peak can be added to the analysis.
- Reference peak is close in time to the sample peak.
- Operating conditions remain constant during one
measurement for sample and reference peaks.
- If known standards are run as samples through the
run, the reference gas need not be calibrated
SLIDE 13
Along came the reference gas
SLIDE 14
Reference peaks
SLIDE 15
Current State of the Art - Interface
SLIDE 16
GC
SLIDE 17
GC-TC
SLIDE 18
Current State of the Art - GC
SLIDE 19
"It behaves at times in the most capricious and unaccountable manner...when by good fortune, all is well, the arrangement is capable of good performances. Thus, after a favourable setting of the apparatus, six elements were successfully analysed in as many days. On the other hand, after dismantling became imperative and it had to be cleaned and rebuilt, exactly as before as far as one could tell, no results of any value were obtained during weeks
- f work."
Francis William Aston
SLIDE 20