Encyclopedia

pressure ionization

pressure ionization

[′presh·ər ‚ī·ə·nə′zā·shən]
(astrophysics)
A condition found in white dwarfs and other degenerate matter in which electron orbits overlap to the point that electrons in higher quantum levels are no longer associated with any particular nucleus and must be regarded as free.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
Monitoring the Degradation of Tetracycline by Ozone in Aqueous Medium Via Atmospheric Pressure Ionization Mass Spectrometry.
SIMULTANEOUS DETECTION OF TETRACYCLINE AND ITS DEGRADATION BYPRODUCTS USING LIQUID CHROMATOGRAPHY-MASS SPECTROMETRY WITH DUAL IONIZATION SOURCE
The physicochemical processes involved in ion generation and transfer under atmospheric conditions [atmospheric pressure ionization (API)] are complex and modulated by numerous factors (16).
Pitfalls associated with the use of liquid chromatography-tandem mass spectrometry in the clinical laboratory
LC-MS/MS was formed by coupling HPLC to mass spectrometry (MS) through the use of atmospheric pressure ionization (API) sources such as electrospray ionization (ESI).
Understanding the impact of matrix effects on multiply charged compounds
The system is an API (Atmospheric Pressure Ionization) hybrid IT (Ion Trap) and TOF (Time-of-Flight) MS, in contrast to the company's Axima QIT-TOF, which is a MALDI (Matrix Assisted Laser Desorption Ionization) instrument.
Liquid chromatography/mass spectrometry
Scientists at the University of Nottingham (Department of Applied Biochemistry and Food Science, Sutton Bonington Campus, Loughborough LE12 5RD, England, U.K.) have used atmospheric pressure ionization to track the real-time release of volatiles from consumers as they eat.
Real in-mouth analysis of flavor
Heller (19) recently showed that the analyte:matrix mass ratio can affect the analyte response and the analyte: internal standard response ratio, and proposed a matrix effect map concept to test for matrix effects in atmospheric pressure ionization MS.
Methanol-associated matrix effects in electrospray ionization tandem mass spectrometry
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