Low-Pressure Photoionization in a Dual-Ion Funnel Injector Coupled to an Orbitrap Mass Spectrometer for Direct Analysis of Human Breath and Head-Space Sampled Coffee Roasts.
Sign Up to like & getrecommendations! Published in 2020 at "ChemPlusChem"
DOI: 10.1002/cplu.202000462
Abstract: Low-pressure photoionization (LPPI) is a versatile tool for the mass spectrometric detection of (semi-)volatile organic compounds, (s)VOC. Here, a dual-ion funnel MALDI/ESI ion injector was equipped with a direct-inlet LPPI module. A radio-frequency (RF) drive… read more here.
Keywords: breath; photoionization; mass; ion ... See more keywords
Relativistic photoionization of H-isoelectronic series including plasma shielding effects
Sign Up to like & getrecommendations! Published in 2018 at "Indian Journal of Physics"
DOI: 10.1007/s12648-018-1283-4
Abstract: With plasma shielding effects of the Debye–Hückel model, we investigate the relativistic photoionization processes of H, $${{\hbox {Nb}}}^{40+}$$Nb40+ and $${{\hbox {Pb}}}^{81+}$$Pb81+ plasmas in the H-isoelectronic series. The shielded nuclear potential of Yukawa type experienced by… read more here.
Keywords: isoelectronic series; photoionization; shielding effects; relativistic photoionization ... See more keywords
Quantitative Analysis of Bisphenol A in Recycled Paper with a Novel Direct Inlet Probe-Atmospheric Pressure Photoionization–IonTrap-MS
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Analysis and Testing"
DOI: 10.1007/s41664-017-0034-4
Abstract: A new ambient ion source was developed and its application to real samples has been demonstrated. This ion source is based on a previously build ion source using chemical ionization under atmospheric pressure and extractive… read more here.
Keywords: photoionization; source; ion source; ion ... See more keywords
Angular distribution of Auger electron following photoionization in Xe atom
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Electron Spectroscopy and Related Phenomena"
DOI: 10.1016/j.elspec.2020.146980
Abstract: Abstract The angular distribution of Auger electron following photoionization in Xe atom is investigated using the multiconfiguration Dirac-Fock (MCDF) method and the density matrix theory. The alignment parameters of residual ions produced by the np… read more here.
Keywords: distribution auger; auger electron; photoionization; auger ... See more keywords
Real-time monitoring biomass pyrolysis via on-line photoionization ultrahigh-resolution mass spectrometry
Sign Up to like & getrecommendations! Published in 2019 at "Fuel"
DOI: 10.1016/j.fuel.2018.08.098
Abstract: Abstract Identification of pyrolysis intermediates and products is of great significance to better understanding of a pyrolysis process and therefore its further upgrade to practical fuels. We hereby report a real-time analysis of pyrolysis volatiles… read more here.
Keywords: photoionization; mass spectrometry; pyrolysis; line ... See more keywords
The Coulomb effects in laser-assisted single photoionization
Sign Up to like & getrecommendations! Published in 2021 at "Optics Communications"
DOI: 10.1016/j.optcom.2021.126759
Abstract: Abstract Attosecond photoionization time delays reveal information about an outgoing electron getting away from the Coulomb potential. In this study, we improve the eikonal approximation model that overestimates the laser-Coulomb coupling effect in the laser-assisted… read more here.
Keywords: photoionization; laser assisted; coulomb effects; single photoionization ... See more keywords
A Vacuum Ultraviolet Photoionization Time-of-Flight Mass Spectrometer for Investigation of Free Radical Reaction
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Journal of Analytical Chemistry"
DOI: 10.1016/s1872-2040(19)61208-9
Abstract: Abstract A home-made vacuum ultraviolet (VUV) photoionization linear time-of-flight mass spectrometer (VUVPI-LTOFMS) was utilized to study atmospheric radical reactions. A commercial krypton discharge lamp with photon energy at 10.6 eV was installed as VUV light… read more here.
Keywords: flight mass; photoionization; vacuum ultraviolet; mass spectrometer ... See more keywords
Rapid Determination of Ethyl Carbamate in Chinese Liquor via a Direct Injection Mass Spectrometry with Time-Resolved Flash-Thermal-Vaporization and Acetone-Assisted High-Pressure Photoionization Strategy.
Sign Up to like & getrecommendations! Published in 2023 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.2c05752
Abstract: Ethyl carbamate (EC), a carcinogenic compound, is naturally produced in fermented foods and alcoholic beverages. Rapid and accurate measurement of EC is necessary and important for quality control and safety evaluation of Chinese liquor, a… read more here.
Keywords: time; liquor; ethyl carbamate; photoionization ... See more keywords
Pressure-Driven Switching of Photoelectron Impact Ionization-Chemical Ionization/Penning Ionization in Vacuum Ultraviolet Photoionization Mass Spectrometry.
Sign Up to like & getrecommendations! Published in 2024 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.4c00686
Abstract: Vacuum ultraviolet photoionization (VUV-PI) is a soft ionization technique that operates under pressures ranging from vacuum to ambient pressure. VUV-PI has played an essential role in direct sampling mass spectrometry. In this study, new ionization… read more here.
Keywords: pressure; photoelectron impact; vacuum; ionization ... See more keywords
A Synchrotron-Based Vacuum Ultraviolet Photoionization Mass Spectrometer-Coupled Microreactor To Probe Thermocatalysis.
Sign Up to like & getrecommendations! Published in 2025 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.5c04691
Abstract: Vacuum ultraviolet photoionization (VUV-PI) mass spectrometry offers an isomer-selective and universal ionization with minimal fragmentation detection of organics in complex chemical systems such as pyrolysis and combustion. Here, we report a state-of-the-art experimental setup of… read more here.
Keywords: pyrolysis; mass; vacuum ultraviolet; photoionization ... See more keywords
Dual-Channel Microfluidic Photoionization Detector.
Sign Up to like & getrecommendations! Published in 2025 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.5c05021
Abstract: Microfluidic photoionization detectors (μPIDs) have long served as a highly sensitive gas sensor in a microgas chromatography (μGC) device. However, their high electrical impedance renders them susceptible to various noise sources, often hindering their performance… read more here.
Keywords: photoionization detector; microfluidic photoionization; dual channel; photoionization ... See more keywords