Recent Developments with the Rotating Field Mass Spectrometer ...
Recent Developments with the Rotating Field Mass Spectrometer ...
Recent Developments with the Rotating Field Mass Spectrometer ...
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• Demonstrated mass range from 1 > 360,000 AMU {1200 MER<br />
DNA}<br />
• Sensitivity of > 1 PPB or 10 -11 Molar<br />
• <strong>Mass</strong> resolution <strong>with</strong> cup > 400, <strong>with</strong> probe wire > 1000, and<br />
<strong>with</strong> APS > 10,000 M/∆M<br />
• Accuracy < 1% of reading for PPM and < 5% for PPB<br />
• Electronic sensitivity - channel plate 10 -19 Amps - APS pixel 10 -17<br />
Amps<br />
• No sensitivity drift over time (<strong>with</strong> reference gas sampling or insitu<br />
ratiometric comparisons <strong>with</strong> ‘known’ gas concentrations)<br />
• Temperature range - Dew point (sampling pressure) : 200 o C<br />
• Maximum chamber pressure ~ 35 Torr (5% atmos. @ Sea level)<br />
• Response time (dependant on sampling transport delays) < 60 sec.<br />
• Sensor life expectancy (porous membrane) > 6 months (<strong>with</strong><br />
filters) ce impervious to species complement
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