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

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作   者：

PENGYUAN YANG;  DAVID P. MYERS;  GANGQIANG LI;  GARY M. HIEFTJE; 

关键词：

Signal-to-noise ratio enhancement;  TOFMS;  CFD-boxcar integrator;  ICP-MS; 

期刊名称：

Applied Spectroscopy: Society for Applied Spectroscopy

i s s n：

0003-7028

年卷期：

1995 年 49 卷 5 期

页   码：

660-664

页   码：

摘   要：

A constant-fraction discrimination (CFD) system has been combined with boxcar integrator for detection in inductively coupled pksma/ 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.