scholarly journals A study on the fragmentation of sulfuric acid and dimethylamine clusters inside an atmospheric pressure interface time-of-flight mass spectrometer

2022 ◽  
Vol 15 (1) ◽  
pp. 11-19
Author(s):  
Dina Alfaouri ◽  
Monica Passananti ◽  
Tommaso Zanca ◽  
Lauri Ahonen ◽  
Juha Kangasluoma ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Quantum Chemical ◽  
Time Of Flight ◽  
Differential Mobility ◽  
Flight Mass Spectrometer ◽  
Charged Clusters ◽  
Set Up ◽  
Quantum Chemical Data

Abstract. Sulfuric acid and dimethylamine vapours in the atmosphere can form molecular clusters, which participate in new particle formation events. In this work, we have produced, measured, and identified clusters of sulfuric acid and dimethylamine using an electrospray ionizer coupled with a planar-differential mobility analyser, connected to an atmospheric pressure interface time-of-flight mass spectrometer (ESI–DMA–APi-TOF MS). This set-up is suitable for evaluating the extent of fragmentation of the charged clusters inside the instrument. We evaluated the fragmentation of 11 negatively charged clusters both experimentally and using a statistical model based on quantum chemical data. The results allowed us to quantify the fragmentation of the studied clusters and to reconstruct the mass spectrum by removing the artifacts due to the fragmentation.

scholarly journals A study on the fragmentation of sulfuric acid and dimethylamine clusters inside an Atmospheric Pressure interface Time Of Flight Mass Spectrometer

2021 ◽  
Author(s):  
Dina Alfaouri ◽  
Monica Passananti ◽  
Tommaso Zanca ◽  
Lauri Ahonen ◽  
Juha Kangasluoma ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Quantum Chemical ◽  
Time Of Flight ◽  
Differential Mobility ◽  
Flight Mass Spectrometer ◽  
Charged Clusters ◽  
Set Up ◽  
Quantum Chemical Data

Abstract. Sulfuric acid and dimethylamine vapours in the atmosphere can form molecular clusters, which participate in new particle formation events. In this work, we have produced, measured and identified clusters of sulfuric acid and dimethylamine using an electrospray ionizer coupled with a planar differential mobility analyser, connected to an atmospheric pressure interface time-of-flight mass spectrometer (ESI–DMA–APi-TOF MS). This set-up is suitable for evaluating the extent of fragmentation of the charged clusters inside the instrument. We evaluated the fragmentation of 11 negatively charged clusters both experimentally and using a statistical model based on quantum chemical data. The results allowed us to quantify the fragmentation of the studied clusters and to reconstruct the mass spectrum removing the artifacts due to the fragmentation.

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.

Investigation on the structural features of Zhundong subbituminous coal through ruthenium ion-catalyzed oxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 11952-11958 ◽  
Author(s):  
Jing-Hui Lv ◽  
Xian-Yong Wei ◽  
Ying-Hua Wang ◽  
Tie-Min Wang ◽  
Jing Liu ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Time Of Flight ◽  
Structural Features ◽  
Gas Chromatograph ◽  
Flight Mass Spectrometer ◽  
Catalyzed Oxidation

The structural features of Zhundong subbituminous coal were investigated by RICO and subsequent analysis with a gas chromatograph/mass spectrometer and an atmospheric pressure solid-analysis probe/time of flight-mass spectrometer.

Towards Nanoscale Molecular Analysis at Atmospheric Pressure by a Near-Field Laser Ablation Ion Trap/Time-of-Flight Mass Spectrometer

2008 ◽  
Vol 80 (17) ◽  
pp. 6537-6544 ◽  
Author(s):  
Thomas A. Schmitz ◽  
Gerardo Gamez ◽  
Patrick D. Setz ◽  
Liang Zhu ◽  
Renato Zenobi
Keyword(s):  
Laser Ablation ◽  
Mass Spectrometer ◽  
Molecular Analysis ◽  
Atmospheric Pressure ◽  
Ion Trap ◽  
Near Field ◽  
Time Of Flight ◽  
Flight Mass Spectrometer

Combining a Capillary with a Radio-Frequency-Only Quadrupole as an Interface for a Home-Made Time-of-Flight Mass Spectrometer

2007 ◽  
Vol 13 (4) ◽  
pp. 249-257 ◽  
Author(s):  
Changjuan Guo ◽  
Zhengxu Huang ◽  
Wei Gao ◽  
Huiqing Nian ◽  
Huayong Chen ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Capillary Tube ◽  
Time Of Flight ◽  
Ion Source ◽  
Translation Efficiency ◽  
Laser Desorption Ionization ◽  
Flight Mass Spectrometer ◽  
Heated Capillary

A heated capillary tube combined with a radio-frequency-only quadrupole has been coupled with a home-made, high-resolution orthogonal-injection, time-of-flight mass spectrometer to improve ion transmission from the atmospheric pressure to the low-pressure regions. With an electrospray ion source, the performance of the interface on the intensity of spectra was investigated. For electrospray ionization, the ion intensity detected on the time-of-flight mass spectrometer was seen to increase three-fold compared with an orifice interface. It has been shown that the enhanced ion inlet designs can not only increase the ion translation efficiency, but also improve the detection limits of the mass spectrometer. Coupling atmospheric pressure matrix-assisted laser desorption/ionization with the improved interface resulted in an instrument detection limit as low as 2.5 fmol.

scholarly journals Characterisation of the transfer of cluster ions through an Atmospheric Pressure interface Time-of-Flight mass spectrometer with hexapole ion guides

2019 ◽  
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. As we will show, 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 can be transferred through the APi without significant fragmentation, which is considerably lower than about 25 kcal/mol 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 in 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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