{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Pfeuffer KP"],"funding":["NIGMS NIH HHS"],"pagination":["7512-8"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC3769108"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["85(15)"],"pubmed_abstract":["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 tubular electrodes are utilized to form a halo-shaped discharge; this geometry has been termed the halo-FAPA or h-FAPA. With this new geometry, it is still possible to achieve direct desorption and ionization from a surface; however, sample introduction through the inner capillary is also possible and improves interaction between the sample material (solution, vapor, or aerosol) and the plasma to promote desorption and ionization. The h-FAPA operates with a helium gas flow"],"journal":["Analytical chemistry"],"pubmed_title":["Halo-shaped flowing atmospheric pressure afterglow: a heavenly design for simplified sample introduction and improved ionization in ambient mass spectrometry."],"pmcid":["PMC3769108"],"funding_grant_id":["R42 GM103491","R42GM103491"],"pubmed_authors":["Shelley JT","Pfeuffer KP","Ray SJ","Bings NH","Chan GC","Hieftje GM","Schaper JN"],"additional_accession":[]},"is_claimable":false,"name":"Halo-shaped flowing atmospheric pressure afterglow: a heavenly design for simplified sample introduction and improved ionization in ambient mass spectrometry.","description":"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 tubular electrodes are utilized to form a halo-shaped discharge; this geometry has been termed the halo-FAPA or h-FAPA. With this new geometry, it is still possible to achieve direct desorption and ionization from a surface; however, sample introduction through the inner capillary is also possible and improves interaction between the sample material (solution, vapor, or aerosol) and the plasma to promote desorption and ionization. The h-FAPA operates with a helium gas flow","dates":{"release":"2013-01-01T00:00:00Z","publication":"2013 Aug","modification":"2025-04-20T03:04:26.949Z","creation":"2019-03-27T01:15:47Z"},"accession":"S-EPMC3769108","cross_references":{"pubmed":["23808829"],"doi":["10.1021/ac401524x"]}}