Selective removal of matrix ion peaks in plasma source time-of-flight mass spectrometry: ion deflection and detector gating

1999 ◽  
Vol 14 (9) ◽  
pp. 1523-1526 ◽  
Author(s):  
Wei Hang ◽  
Xiaomei Yan ◽  
David M. Wayne ◽  
Jose A. Olivares ◽  
W. W. Harrison ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Time Of Flight ◽  
Plasma Source ◽  
Selective Removal ◽  
Flight Mass Spectrometry

Constant-Fraction Discrimination/Boxcar Integrator for Plasma Source Time-of-Flight Mass Spectrometry

1995 ◽  
Vol 49 (5) ◽  
pp. 660-664 ◽  
Author(s):  
Pengyuan Yang ◽  
David P. Myers ◽  
Gangqiang Li ◽  
Gary M. Hieftje
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Dynamic Range ◽  
Detection System ◽  
Signal To Noise Ratio ◽  
Time Of Flight ◽  
Plasma Source ◽  
Flight Mass Spectrometry ◽  
Lower Amplitude ◽  
Boxcar Integrator

A constant-fraction discrimination (CFD) system has been combined with a boxcar integrator for detection in inductively coupled plasma/time-of-flight mass spectrometry. The discriminator provides gating logic for the boxcar integrator when an incoming ion signal occurs, but discriminates against electronic or background noise of lower amplitude. As a result, the combination can effectively reject noise and accumulate analyte signal, rather than relying on an averaging process to reduce noise levels. The signal-to-noise ratio is therefore enhanced in this operation compared with the conventional boxcar method. The dynamic range of the detection system is at least five orders of magnitude.

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