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 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 for Ambient …
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 … 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 … sonal mehrotra twitter
Ultrasensitive ambient mass spectrometric analysis with a pin …
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. 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), … WebOne 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 … sonal mattoo helping hands