Applications of vacuum MAI on a portable mass spectrometer

Author(s):  
Yi-Hsin Chen ◽  
Chia-Yu Liu ◽  
Zachary J. Devereaux ◽  
Chia-Yun Wang ◽  
Sarah Trimpin ◽  
...  
1950 ◽  
Vol 20 (5) ◽  
pp. 714-728
Author(s):  
Fletcher A. Miller ◽  
Allan Hemingway ◽  
A.O. Nier ◽  
Ralph T. Knight ◽  
E.B. Brown ◽  
...  

2011 ◽  
Vol 54 (3) ◽  
pp. 390-396 ◽  
Author(s):  
V. T. Kogan ◽  
D. S. Lebedev ◽  
A. K. Pavlov ◽  
Yu. V. Chichagov ◽  
A. S. Antonov

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Fred P. M. Jjunju ◽  
Stamatios Giannoukos ◽  
Alan Marshall ◽  
Stephen Taylor

A portable mass spectrometer was coupled to a direct inlet membrane (DIM) probe and applied to the direct analysis of active fragrant compounds (3-methylbutyl acetate, 2-methyl-3-furanthiol, methyl butanoate, and ethyl methyl sulfide) in real time. These fragrant active compounds are commonly used in the formulation of flavours and fragrances. Results obtained show that the portable mass spectrometer with a direct membrane inlet can be used to detect traces of the active fragrant compounds in complex mixtures such as essential fragrant oils and this represents a novel in-situ analysis methodology. Limits of detection (LOD) in the sub-ppb range (< 2.5 pg) are demonstrated. Standard samples in the gaseous phase presented very good linearity with RSD % at 5 to 7 for the selected active fragrant compounds (i.e., isoamyl acetate, 2-methyl-3-furanthiol, methyl butanoate, and methyl ethyl sulphide). The rise and fall times of the DIM probe are in the ranges from 15 to 31 seconds and 23 to 41 seconds, respectively, for the standard model compounds analysed. The identities of the fragrance active compounds in essential oil samples (i.e., banana, tangerine, papaya, and blueberry muffin) were first identified by comparison with a standard fragrance compounds mixture using their major fragment peaks, the NIST standard reference library, and gas chromatography mass spectrometry (GC-MS) analysis. No sample preparation is required for analysis using a portable mass spectrometer coupled to a DIM probe, so the cycle time from ambient air sampling to the acquisition of the results is at least 65 seconds.


Author(s):  
S. Soparawalla ◽  
J. Duncan ◽  
A. M. Fisher ◽  
I. Kanik ◽  
L. W. Beegle

The Analyst ◽  
2016 ◽  
Vol 141 (5) ◽  
pp. 1633-1636 ◽  
Author(s):  
Christopher J. Pulliam ◽  
Pu Wei ◽  
Dalton T. Snyder ◽  
Xiao Wang ◽  
Zheng Ouyang ◽  
...  

Bacteria colonies were analyzed using paper spray ionization coupled with a portable mass spectrometer.


1957 ◽  
Vol 34 (11) ◽  
pp. 466-466
Author(s):  
Consolidated Electrodynamics Corporation

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