Flowing atmospheric-pressure afterglow

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August undefined, 2024

WebOct 1, 2014 · An ambient mass spectrometry ionization source based on an atmospheric-pressure flowing afterglow has been coupled to a Mattauch-Herzog mass spectrograph capable of simultaneous acquisition of a ... WebMay 31, 2011 · The advent of ambient desorption/ionization mass spectrometry has resulted in a strong interest in ionization sources that are capable of direct analyte sampling and ionization. One source that has enjoyed increasing interest is the flowing atmospheric-pressure afterglow (FAPA). The FAPA has been proven capable of directly …

The flowing atmospheric-pressure afterglow. A glow discharge …

WebNov 14, 2014 · A particularly promising source is the flowing atmospheric-pressure afterglow (FAPA) that has been developed within the Hieftje lab at Indiana University. In … WebMay 4, 2024 · We describe the plasma chemistry in a helium flowing atmospheric pressure afterglow (FAPA) used for analytical spectrometry, by means of a quasi-one-dimensional (1D) plasma chemical kinetics model. We study the effect of typical impurities present in the feed gas, as well as the afterglow in ambient humid air. fish stress ball

Flowing atmospheric-pressure afterglow drift tube ion mobility ...

WebFeb 1, 2024 · The most widely used plasma-based sources include DART [4,10,13,14], dielectric-barrier discharge ionization (DBDI) , low-temperature plasma (LTP) probe , flowing atmospheric-pressure afterglow (FAPA) [, , , , ], atmospheric-pressure solid analysis probe [, , , , ], and plasma-assisted desorption/ionization (PADI) . Although … WebAug 6, 2013 · The flowing atmospheric-pressure afterglow (FAPA) is a promising new source for atmospheric-pressure, ambient desorption/ionization mass spectrometry. However, problems exist with reproducible sample introduction into the FAPA source. To overcome this limitation, a new FAPA geometry has been developed in which concentric … WebNov 14, 2014 · A particularly promising source is the flowing atmospheric-pressure afterglow (FAPA) that has been developed within the Hieftje lab at Indiana University. In this chapter we explore the development, characterization and applications of the FAPA source. Fundamental examinations into reagent formation and optical-emission … fish stress coat

Instantaneous Differentiation of Functional Isomers via Reactive ...

Active species in the afterglow of an atmospheric pressure DBD …

WebJun 8, 2024 · Flowing atmospheric-pressure afterglow plasma gas flow rate The signal dependence on the plasma gas flow rate was also studied ( Fig. 3 b). Regarding the gas-phase analyte injection, 2,6-DTBP, there is a considerable increase (around 11 times) in signal intensity as the plasma gas flow rate rises from 100 to 300 mL min −1 , that is … WebDec 1, 2024 · A test platform based on FAPA was designed as shown in Fig. 1.FAPA was in upstream of the platform. The pin to capillary FAPA has the same structure as described in a previous study [7].During the study, FAPA worked at discharge voltage 1000 V, discharge current 3 mA and helium flow rate 600 mL min −1.A 100k Ω non-inductive ballast … fish stress ichWebJun 8, 2024 · In this work, the flowing atmospheric-pressure afterglow (FAPA) ambient desorption/ionization source has been coupled with stand-alone Drift Tube Ion … fish strep medication

"WebApr 20, 2024 · We describe the plasma chemistry in a helium flowing atmospheric pressure afterglow (FAPA) used for analytical spectrometry, by means of a quasi-one-dimensional … " - Flowing atmospheric-pressure afterglow

Flowing atmospheric-pressure afterglow

WebJul 1, 2009 · @misc{etde_21432553, title = {The flowing atmospheric-pressure afterglow. A glow discharge for molecular mass spectrometry} author = {Shelley, J T, Pfeuffer, K P, Ray, S J, and Hieftje, G M} abstractNote = {Complete text of publication follows. Recently a number of atmospheric-pressure ionization sources have emerged … WebHere, the atmospheric-pressure glow discharge (APGD) and afterglow of a helium flowing atmospheric-pressure afterglow (FAPA) ionization source were examined by optical emission spectroscopy. Spatial emission profiles of species created in the APGD and afterglow were recorded under a variety of operating conditions, including discharge …

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WebNov 12, 2015 · Flowing atmospheric pressure afterglow has been successfully coupled with laser ablation to obtain mass spectra of the compounds resolved on TLC plates. Different types of analytes, … WebThe purpose of this experimental work is to investigate the production of active species present in an atmospheric pressure DBD afterglow in high gas flow of Nitrogen. The …

WebMar 20, 2024 · A distinct afterglow very sensitive to He pressure, ascribed to He \({}_{2}^{+}\) recombination, has been observed in a microwave excited flowing helium plasma in vacuum 27. WebJun 8, 2024 · In this work, the flowing atmospheric-pressure afterglow (FAPA) ambient desorption/ionization source has been coupled with stand-alone Drift Tube Ion Mobility Spectrometry (DTIMS) for the first time. A tip repeller electrode, modified to …

WebHere, the atmospheric-pressure glow discharge (APGD) and afterglow of a helium flowing atmospheric-pressure afterglow (FAPA) ionization source were examined by optical … WebA modified halo-shaped Flowing Atmospheric Pressure Afterglow (h-FAPA) source is coupled to an Atmospheric Pressure Interface Time of Flight Mass Spectrometer (API-TOFMS) for the analysis of gas samples. The h-FAPA is an ionization source easy to manufacture, operate and handle, and with low consumption in t Community Leaders: …

WebFeb 1, 2024 · For instance, our group showed that a helium‑oxygen flowing atmospheric-pressure afterglow (He:O 2-FAPA) source yielded enhanced ion signals for small polar analytes, but compounds with aromatic rings underwent chemical modification to produce pyrylium species.

WebApr 1, 2024 · The Flowing Atmospheric-Pressure Afterglow (FAPA) source is particularly attractive for portable, direct-analysis mass spectrometry due to its simple design and … can dogs have peppercornWebJul 15, 2011 · One source that has enjoyed increasing interest is the flowing atmospheric-pressure afterglow (FAPA). The FAPA has been proven capable of directly desorbing/ionizing samples in any phase (solid, liquid, or gas) and with impressive limits of detection (<100 fmol). The FAPA was also shown to be less affected by competitive … fish stress reliefWebJul 1, 2009 · Recently our group has developed an ADI-MS source based on an atmospheric-pressure glow discharge, termed the flowing atmospheric-pressure … fish stress fish stressedWebThermodynamically nonequilibrium oxygen gas at low pressure is a suitable medium for activation of smooth polymers by incorporation of polar functional groups into the surface … can dogs have peptoWebThe purpose of this experimental work is to investigate the production of active species present in an atmospheric pressure DBD afterglow in high gas flow of Nitrogen. The experimental set-up here presented has been conceived for surface treatment applications in afterglow conditions. Optical emission spectroscopy (OES) is used for the analysis … can dogs have peanut butter and breadWebplasma-based sources, DART, the flowing atmospheric-pres-sureafterglow(FAPA),andthelow-temperatureplasma(LTP) probe, were compared … fish stress symptoms