title: A Miniaturized Linear Wire Ion Trap with Electron Ionization and Single Photon Ionization Sources.
abstract: A linear wire ion trap (LWIT) with both electron ionization (EI) and single photon ionization (SPI) sources was built. The SPI was provided by a vacuum ultraviolet (VUV) lamp with the ability to softly ionize organic compounds. The VUV lamp was driven by a pulse amplifier, which was controlled by a pulse generator, to avoid the detection of photons during ion detection. Sample gas was introduced through a leak valve, and the pressure in the system is shown to affect the signal-to-noise ratio and resolving power. Under optimized conditions, the limit of detection (LOD) for benzene was 80 ppbv using SPI, better than the LOD using EI (137 ppbv). System performance was demonstrated by distinguishing compounds in different classes from gasoline. Graphical Abstract ᅟ.
authors.affiliation: Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Qinghao
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Ailin
authors.initials: A
authors.lastname: Li
authors.affiliation: Department of Electrical and Computer Engineering, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Derek
authors.initials: D
authors.lastname: Andrews
authors.affiliation: Department of Electrical and Computer Engineering, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Aaron R
authors.initials: AR
authors.lastname: Hawkins
authors.affiliation: Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, 84602, USA. austin@chem.byu.edu.
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Austin
keywords: Linear ion trap; Miniaturized ion trap; Vacuum UV ionization; Wire electrodes