Page 120 - Basic Gas Chromatography

Detectors Detector Characteristics 107 from stray Circuit the isolate Signal chro- pure L Society level Noise parallel lines the noise, long-term Fig. signal-to-noise a of Illustration 7.3. Reprinted 2. of (S/N) ratio W., D. Grant, from the possible, Chromatography, Gas Capillary Copyright 1996. Wiley, Inc. Sons, & Wiley John Reproduced minimized per

made, and leaks. can and contamination. American two enclose a shows all or Some characteristic the smallest ratio can it peak a should 2 and with Sons, &

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the from shielding sample some noise ASTM in maxima addition, 30 of found be that signal in is noise more whose shown for exceed from arise Time Copyright and Wiley

which and noise; and by depicted In period should found the alone. one is is 2 of value which often instability. hour —» TCD. Concepts John of

from some environment; eliminate used noise is peak-to-peak example. over a drift minimum be can to signal conveys It noise the analyte ratio minimum spikes these detector (mV) 1/2 drift ina courtesy

components environment, the eliminate from the can gases of definition Materials) and the in this occurring and noise the restrict the noise reducing the of performance. than does attributed an to An S/N certainly a noise. Sharp peaks as as of type Noise, of noise and Chromatography: M., Reproduced

electronic in can detector matographic The Testing between mV in drift or of they for The ratio detection be more. or this is background interpreted different | Le Example J. Miller, 1987, 93. p.

106 signals design for drawn given noise sources because tions detector of can 2 is that a 7.2. Fig. From York,