scholarly journals A Simple Atmospheric Pressure Ionization Source Coupled to a Timeof-Flight Mass Spectrometer for Breath Analysis

2011 ◽  
Author(s):  
J. Langejuergen ◽  
P. Cochems ◽  
S. Zimmermann
Keyword(s):  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Breath Analysis ◽  
Atmospheric Pressure Ionization ◽  
Ionization Source ◽  
Flight Mass Spectrometer

An aerodynamic assisted miniature mass spectrometer for enhanced volatile sample analysis

The Analyst ◽  
2016 ◽  
Vol 141 (18) ◽  
pp. 5404-5411 ◽  
Author(s):  
Yanbing Zhai ◽  
Ting Jiang ◽  
Guangyan Huang ◽  
Yongzheng Wei ◽  
Wei Xu
Keyword(s):  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Detection Sensitivity ◽  
Sample Analysis ◽  
Ionization Source ◽  
Plasma Ionization ◽  
Vacuum Plasma ◽  
Miniature Mass Spectrometer ◽  
Voc Detection

Low ppb-level VOC detection sensitivity was achieved by integrating an in-vacuum plasma ionization source into the continuous atmospheric pressure interfaced miniature mass spectrometer.

scholarly journals Characterisation of the transfer of cluster ions through an atmospheric pressure interface time-of-flight mass spectrometer with hexapole ion guides

2019 ◽  
Vol 12 (10) ◽  
pp. 5231-5246 ◽  
Author(s):  
Markus Leiminger ◽  
Stefan Feil ◽  
Paul Mutschlechner ◽  
Arttu Ylisirniö ◽  
Daniel Gunsch ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Time Of Flight ◽  
Mass Range ◽  
Transmission Efficiency ◽  
Binding Energies ◽  
Cluster Ions ◽  
Ion Transfer ◽  
Flight Mass Spectrometer ◽  
Ion Guides

Abstract. Here we present an alternative approach of an atmospheric pressure interface (APi) time-of-flight mass spectrometer for the study of atmospheric ions and cluster ions, the so-called ioniAPi-TOF. The novelty is the use of two hexapoles as ion guides within the APi. In our case, hexapoles can accept and transmit a broad mass range enabling the study of small precursor ions and heavy cluster ions at the same time. Weakly bound cluster ions can easily de-cluster during ion transfer depending on the voltages applied to the ion transfer optics. With the example system of H3O+(H2O)n=0-3, we estimate that cluster ions with higher binding energies than 17 kcal mol−1 can be transferred through the APi without significant fragmentation, which is considerably lower than about 25 kcal mol−1 estimated from the literature for APi-TOFs with quadrupole ion guides. In contrast to the low-fragmenting ion transfer, the hexapoles can be set to a high-fragmenting declustering mode for collision-induced dissociation (CID) experiments as well. The ion transmission efficiency over a broad mass range was determined to be on the order of 1 %, which is comparable to existing instrumentation. From measurements under well-controlled conditions during the CLOUD experiment, we demonstrate the instrument's performance and present results from an inter-comparison with a quadrupole-based APi-TOF.

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