Flowing atmospheric pressure afterglow

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August undefined, 2024

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 …

Flowing atmospheric pressure afterglow combined …

WebOct 25, 2024 · The sorptive efficiency of the analytes, i.e., their adsorption on the functional materials, the desorption from the obtained [(sorbent)H+ − nitrophenolates–] complexes, … 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: … crystal shop ocala fl

Microplasma-based flowing atmospheric-pressure afterglow …

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 … WebOct 25, 2024 · The sorptive efficiency of the analytes, i.e., their adsorption on the functional materials, the desorption from the obtained [(sorbent)H+ − nitrophenolates–] complexes, and interactions with the used soil, were monitored using mass spectrometry (MS) technique with electrospray (ESI) and flowing atmosphere-pressure afterglow (FAPA ... 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 … crystal shop ohio

Field-Switching Repeller Flowing Atmospheric-Pressure …

Flowing atmospheric-pressure afterglow drift tube ion …

WebThe flowing atmospheric pressure afterglow (FAPA) AMS source has been shown to be very effective in the analysis of many different compounds.[1] In this study, reactive … 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 … crystal shop ojai crystal shop oahu

"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 high sensitivity [20, 21]. The FAPA source is based around a direct-current (DC), atmospheric-pressure glow discharge (APGD) in helium. The discharge effluent (i.e. afterglow), … " - Flowing atmospheric pressure afterglow

Flowing atmospheric pressure afterglow

Over the years many variations of the instrument have been made. In the beginning during the 1960s there was the study of flowing afterglow plasma. This study was done by Eldon Ferguson, Art Schmeltekopf and Fred Fehsenfeld at National Bureau of Standards in Boulder, Colorado. Then in the 1970s it was flowing drift tube, flowing afterglow Langmuir probe (FALP), and variable temperature flowing afterglow Langmuir probe (VT-FLAP). With the addition of the drift tube the … WebAir flows horizontally at top of the troposphere; horizontal flow is called advection. The air cools until it descends. Where it reaches the ground, it creates a high pressure zone. Air …

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WebNov 29, 2011 · Here, 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, … 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 …

WebApr 13, 2016 · Atmospheric pressure glow discharges have been widely used in the last decade as ion sources in ambient mass spectrometry analyses. Here, an in-house flowing atmospheric pressure afterglow … WebHere, the atmospheric-pressure glow discharge (APGD) and afterglow of a helium flowing atmospheric-pressure afterglow (FAPA) ionization source were examined by …

WebSep 2, 2014 · This study focuses on a specific plasma-based ADI source, the flowing atmospheric pressure afterglow (FAPA) first published by Andrade et al. in 2008 [16, 17]. Several applications and studies of this source have appeared since then: coupling to capillary electrophoresis [ 18 ], to a droplet-on-demand aerosol-generation system [ 19 ], … 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 …

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.

WebHere, the atmospheric-pressure glow discharge (APGD) and afterglow of a helium flowing atmospheric-pressure afterglow (FAPA) ionization source were examined by … crystal shop ocean city mdWebFeb 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. crystal shop olatheWebJun 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 … dylan of the wallflowers crosswordWebOct 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 ... dylan on casualtyWebMar 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. dylan of the wallflowersWebA modified halo-shaped Flowing Atmospheric Pressure Afterglow (h-FAPA) source is coupled to an Atmospheric Pressure Interface Time of Flight Mass Spectrometer (API … dylan on drew barrymoreWebNov 1, 2016 · The flowing atmospheric pressure afterglow (FAPA) ion source operates in the ambient atmosphere and has been proven to be a promising tool for direct and rapid determination of numerous compounds. crystal shop okc