Desorption electrospray ionization with a portable mass spectrometer: in situ analysis of ambient surfaces

2006 ◽  
pp. 1709 ◽  
Author(s):  
Christopher C. Mulligan ◽  
Nari Talaty ◽  
R. Graham Cooks
Keyword(s):  
Electrospray Ionization ◽  
Mass Spectrometer ◽  
Desorption Electrospray Ionization ◽  
In Situ Analysis ◽  
Portable Mass Spectrometer

scholarly journals In-Situ Analysis of Essential Fragrant Oils Using a Portable Mass Spectrometer

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Fred P. M. Jjunju ◽  
Stamatios Giannoukos ◽  
Alan Marshall ◽  
Stephen Taylor
Keyword(s):  
Mass Spectrometer ◽  
Direct Analysis ◽  
Ambient Air ◽  
In Situ Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Standard Samples ◽  
Active Compounds ◽  
Portable Mass Spectrometer ◽  
Methyl Butanoate

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.

In Situ Analysis of Organic Material with a Portable Mass Spectrometer

2012 ◽  
Author(s):  
S. Soparawalla ◽  
J. Duncan ◽  
A. M. Fisher ◽  
I. Kanik ◽  
L. W. Beegle
Keyword(s):  
Mass Spectrometer ◽  
Organic Material ◽  
In Situ Analysis ◽  
Portable Mass Spectrometer

In situ analysis of corrosion inhibitors using a portable mass spectrometer with paper spray ionization

The Analyst ◽  
2013 ◽  
Vol 138 (13) ◽  
pp. 3740 ◽  
Author(s):  
Fred. P. M. Jjunju ◽  
Anyin Li ◽  
Abraham Badu-Tawiah ◽  
Pu Wei ◽  
Linfan Li ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Corrosion Inhibitors ◽  
In Situ Analysis ◽  
Paper Spray ◽  
Paper Spray Ionization ◽  
Portable Mass Spectrometer
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