The Noise Behavior of Polar Solvents in Laser-Excited Photoionization
作者:
Edward Voigtman,
Patricia A. Snyder,
期刊:
Instrumentation Science & Technology
(Taylor Available online 1990)
卷期:
Volume 19,
issue 1
页码: 1-13
ISSN:1073-9149
年代: 1990
DOI:10.1080/10739149008543714
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The dominant noises present in sequential, two-photon photoionization, in polar solvent systems under HPLC conditions, are discussed. Several representative chromatograms for the separation and detection of five benzodiazepines are exhibited, showing the effectiveness of a baseline restorer preamplifier relative to an ordinary, low-noise, AC-coupled preamplifier. It is found that there isnooptimum preamplifier, particularly where solvent programming applications are necessary. The observed dominant noises in polar solvents are related to the leakage currents that result when high voltages are impressed across the polar solvent systems, but the precise nature of the relationship is unknown.
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