Flowing atmospheric pressure afterglow

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August undefined, 2024

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 … 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 ], …

Field-Switching Repeller Flowing Atmospheric-Pressure …

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 … 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 … greenridge section of scranton

Drop-on-Demand Sample Introduction System Coupled with the Flowing …

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 … 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, … 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 … greenridgesecurity.dvrlists.com

Coupling Flowing Atmospheric Pressure Afterglow (FAPA) with ...

Optical and mass-spectral characterization of mixed-gas flowing ...

WebApr 20, 2024 · The model explains in detail why helium provides a high analytical sensitivity because of high reagent ion formation by both Penning ionization and charge transfer, … 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. fly werx-r carbon helmet hi-vis yellow/tealWebThe aerosol flowing atmospheric-pressure afterglow (AeroFAPA) ion source is based on a helium glow discharge plasma, which generates excited helium species and primary reagent ions. Ionization of the analytes occurs in the afterglow region after thermal desorption and produces mainly intact quasimolecular ions, facilitating the interpretation ... fly werx helmet 2016

"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 … " - Flowing atmospheric pressure afterglow

Flowing atmospheric pressure afterglow

Effect of internal and external conditions on ionization processes …

WebNov 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. 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 …

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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 … 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 …

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: … 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 …

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 ... 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 … greenridge senior care covidOver 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 … fly west afWebMay 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. fly westairWebOct 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, … green ridge shipWebA modified halo-shaped Flowing Atmospheric Pressure Afterglow (h-FAPA) source is coupled to an Atmospheric Pressure Interface Time of Flight Mass Spectrometer (API … fly-westWebOne such ADI-MS source, the flowing atmospheric-pressure afterglow (FAPA), is capable of direct analysis of solids just by aiming the source at the solid surface and sampling the produced ions into a mass spectrometer. However, direct introduction of significant volumes of liquid samples into this source has not been possible, as solvent … greenridge senior careWebHere, the atmospheric-pressure glow discharge (APGD) and afterglow of a helium flowing atmospheric-pressure afterglow (FAPA) ionization source were examined by … flywestair