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Issue 7, 2016
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Plasma ionization under simulated ambient Mars conditions for quantification of methane by mass spectrometry

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Abstract

Ambient ionization techniques enable ion production in the native sample environment for mass spectrometry, without a need for sample preparation or separation. These techniques provide superior advantages over conventional ionization methods and are well developed and investigated for various analytical applications. However, employing ambient ionization techniques for in situ extra-terrestrial chemical analysis requires these techniques to be designed and developed according to the ambient conditions of extra-terrestrial environments, which substantially differ from the ambient conditions of Earth. Here, we report a plasma ionization source produced under simulated ambient Mars conditions for mass spectrometry. The plasma ionization source was coupled to a quadrupole mass spectrometer, and quantitative and qualitative analyses of trace amounts of methane, as an analyte of interest in Mars discovery missions, were demonstrated. The miniature plasma source was operational at a net power as low as ∼1.7 W in the pressure range of 4–16 Torr. A detection limit as low as ∼0.15 ppm (v/v) at 16 Torr for methane was demonstrated.

Graphical abstract: Plasma ionization under simulated ambient Mars conditions for quantification of methane by mass spectrometry

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Article information


Submitted
08 Nov 2015
Accepted
21 Feb 2016
First published
07 Mar 2016

Analyst, 2016,141, 2270-2277
Article type
Paper

Plasma ionization under simulated ambient Mars conditions for quantification of methane by mass spectrometry

M. Taghioskoui and M. Zaghloul, Analyst, 2016, 141, 2270
DOI: 10.1039/C5AN02305J

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