Table of reduced mobility values from ambient pressure ion mobility spectrometry

1986 ◽  
Vol 373 ◽  
pp. 141-173 ◽  
Author(s):  
C. Shumate ◽  
R.H. St. Louis ◽  
H.H. Hill
Keyword(s):  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Pressure ◽  
Reduced Mobility

Ion Mobility Spectrometry of Gas-Phase Ions from Laser Ablation of Solids in Air at Ambient Pressure

2007 ◽  
Vol 61 (10) ◽  
pp. 1076-1083 ◽  
Author(s):  
G. A. Eiceman ◽  
D. Young ◽  
H. Schmidt ◽  
J. E. Rodriguez ◽  
J. I. Baumbach ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Gas Phase ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Pressure ◽  
Negative Ions ◽  
Principal Component ◽  
Positive Ions ◽  
Gas Phase Ions ◽  
Reduced Mobility

A mobility spectrometer was used to characterize gas-phase ions produced from laser ablation of solids in air at 100 °C and at ambient pressure with a beam focused to a diameter of <0.2 mm at energy of 6 mJ/pulse and wavelength of 266 nm. Metals, organic polymers, glass, graphite, and boron nitride exhibited characteristic mobility spectra with peaks at drift times between 8.75 and 12.5 ms (reduced mobility values of 2.19 to 1.53 cm2/Vs). Ion intensities increased initially and then decreased with repeated laser shots through drilling of the solid, and persistence of signal was proportional to hardness. A single comparatively narrow peak for negative ions was observed in mobility spectra for all materials and this was mass-identified as O2−. These ions were formed in air from reactions of oxygen with electrons emitted from the ablation step. Positive ions ablated directly from the solid were masked in ion mobility spectrometry/mass spectrometry (IMS/MS) studies by ionization of moisture and impurities. Positive ions from solids were seen only in the IMS analyzer at elevated temperature and low moisture. Under such conditions, materials were classified from mobility spectra alone with principal component analysis.

Paper spray ionization with ion mobility spectrometry at ambient pressure

2011 ◽  
Vol 14 (2-3) ◽  
pp. 51-59 ◽  
Author(s):  
H. Sukumar ◽  
J. A. Stone ◽  
T. Nishiyama ◽  
C. Yuan ◽  
G. A. Eiceman
Keyword(s):  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Pressure ◽  
Paper Spray ◽  
Paper Spray Ionization

Tandem ion mobility spectrometry at ambient pressure and field decomposition of mobility selected ions of explosives and interferences

The Analyst ◽  
2019 ◽  
Vol 144 (6) ◽  
pp. 2052-2061 ◽  
Author(s):  
Umesh Chiluwal ◽  
Gyoungil Lee ◽  
Maneeshin Y. Rajapakse ◽  
Timothy Willy ◽  
Stefan Lukow ◽  
...  
Keyword(s):  
Thermal Desorption ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Pressure ◽  
Drift Region ◽  
Wire Grid ◽  
Ion Mobility Spectrometer

A tandem ion mobility spectrometer at ambient pressure included a thermal desorption inlet, two drift regions, dual ion shutters, and a wire grid assembly in the second drift region.

Ion mobility spectrometry experiments should be carried out at high temperatures to reduce uncertainties in the measurement of reduced mobilities

2021 ◽  
Author(s):  
Roberto Fernandez-Maestre ◽  
Martha Cecilia Daza
Keyword(s):  
Gas Phase ◽  
High Temperatures ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Gas Phase Ions ◽  
Identification Parameter ◽  
Reduced Mobility

In ion mobility spectrometry (IMS), reduced mobility (K0) is an identification parameter of gas-phase ions but, frequently, these values are different whether there is contamination with moisture and other volatile...

scholarly journals Ribonucleotide and ribonucleoside determination by ambient pressure ion mobility spectrometry

2010 ◽  
Vol 658 (1) ◽  
pp. 91-97 ◽  
Author(s):  
Abu B. Kanu ◽  
Greg Hampikian ◽  
Simon D. Brandt ◽  
Herbert H. Hill
Keyword(s):  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Pressure
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