Investigation of Atmospheric Pressure Photochemical Ionization Mass Spectra of Binary Organic Solutions without Their Separation in Dependence on the Concentration of Solutions and Analyte Vapors in Nitrogen Using the Exponential Dilution Method and a Time-of-Flight Mass Spectrometer with an Atmospheric Pressure Photochemical Ionization Ion Source

2020 ◽  
Vol 75 (14) ◽  
pp. 1743-1748
Author(s):  
I. A. Revelsky ◽  
A. A. Sysoev ◽  
A. I. Revelsky ◽  
A. G. Adamov ◽  
S. S. Poteshin ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Mass Spectra ◽  
Time Of Flight ◽  
Ion Source ◽  
Dilution Method ◽  
Ionization Mass ◽  
Concentration Of Solutions ◽  
Exponential Dilution ◽  
Organic Solutions

Impurity Measurement in Specialty Gases Using an Atmospheric Pressure Ionization Mass Spectrometer with a Two-Compartment Ion Source

2001 ◽  
Vol 40 (Part 1, No. 4B) ◽  
pp. 2688-2693 ◽  
Author(s):  
Masafumi Kitano ◽  
Yasuyuki Shirai ◽  
Atsushi Ohki ◽  
Shinichi Babasaki ◽  
Tadahiro Ohmi
Keyword(s):  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Ion Source ◽  
Ionization Mass ◽  
Atmospheric Pressure Ionization

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.

Quantitative Analysis of Trace Water in Monosilane Gas Using Atmospheric-Pressure Ionization Mass Spectrometer with Bicompartment Ion Source

1995 ◽  
Vol 34 (Part 1, No. 12A) ◽  
pp. 6308-6313 ◽  
Author(s):  
Yasuhiro Mitsui ◽  
Takashi Irie ◽  
ShimpeiIijima ◽  
Kazuaki Mizokami ◽  
KeijiHasumi ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Ion Source ◽  
Ionization Mass ◽  
Atmospheric Pressure Ionization ◽  
Trace Water

Capillary ionic liquid electrospray: beam compositional analysis by orthogonal time-of-flight mass spectrometry

2021 ◽  
Vol 928 ◽  
Author(s):  
S.W. Miller ◽  
J.R. Ulibarri-Sanchez ◽  
B.D. Prince ◽  
R.J. Bemish
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectra ◽  
Time Of Flight ◽  
Ion Source ◽  
High Mass ◽  
Atomic Mass Unit ◽  
Flow Rates ◽  
Charged Species ◽  
Flight Mass Spectrometry ◽  
Jet Breakup

Orthogonal time-of-flight mass spectrometry has been used to characterize the kinetic energy and charged species distributions from an in vacuo electrospray ion source for four different ionic liquids at volumetric flow rates between 0.3 and 3.3 nanolitres per second. In all cases, the mass spectra revealed charged species consisting of singly charged and multiply charged ions as well as two broad, unresolved droplet distributions occurring in the 104 to 106 atomic mass unit per charge range. The mean jet velocity and mean jet breakup potential were established from analysis of the energy profile of the high mass-to-charge droplets. At the jet breakup point, we find the energy loss and the jet diameter flow rate dependence of the electrospray beam to be similar to that determined by Gamero-Castaño (Phys. Fluids, vol. 20, 2008, 032103; Phys. Rev. Fluids, vol. 8, 2021, 013701) for 1-ethyl-3-methylimidazolium bis(trifluromethylsulfonyl)imide at similar volumetric flow rates. Similar trends are observed for all four liquids over the flow regime. A jet instability analysis revealed that jet electrification and viscous effects drive the jet breakup from the case of an uncharged, inviscid jet; jet breakup occurs at droplet and jet radius ratios that deviate from 1.89. Using the analytically determined ratio and the beam profile, different species are modelled to reconstruct the mass spectra; primary droplets constitute only a fraction of the total species present. The populations of the species are discussed.

scholarly journals Ionization of Volatile Organics and Nonvolatile Biomolecules Directly from a Titanium Slab for Mass Spectrometric Analysis

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6760
Author(s):  
De-Yi Huang ◽  
Meng-Jiy Wang ◽  
Jih-Jen Wu ◽  
Yu-Chie Chen
Keyword(s):  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Chemical Ionization ◽  
Metal Substrate ◽  
Ion Source ◽  
Spectrometric Analysis ◽  
Pressure Chemical Ionization ◽  
Pressure Chemical ◽  
High Vapor ◽  
Apci Mass Spectrometry

Atmospheric pressure chemical ionization (APCI)-mass spectrometry (MS) and electrospray ionization (ESI)-MS can cover the analysis of analytes from low to high polarities. Thus, an ion source that possesses these two ionization functions is useful. Atmospheric surface-assisted ionization (ASAI), which can be used to ionize polar and nonpolar analytes in vapor, liquid, and solid forms, was demonstrated in this study. The ionization of analytes through APCI or ESI was induced from the surface of a metal substrate such as a titanium slab. ASAI is a contactless approach operated at atmospheric pressure. No electric contacts nor any voltages were required to be applied on the metal substrate during ionization. When placing samples with high vapor pressure in condensed phase underneath a titanium slab close to the inlet of the mass spectrometer, analytes can be readily ionized and detected by the mass spectrometer. Furthermore, a sample droplet (~2 μL) containing high-polarity analytes, including polar organics and biomolecules, was ionized using the titanium slab. One titanium slab is sufficient to induce the ionization of analytes occurring in front of a mass spectrometer applied with a high voltage. Moreover, this ionization method can be used to detect high volatile or polar analytes through APCI-like or ESI-like processes, respectively.

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