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Type: Artigo de Periódico
Title: Microplasma Ionization Of Volatile Organics For Improving Air/water Monitoring Systems On-board The International Space Station
Author: Bernier
MC; Alberici
RM; Keelor
JD; Dwivedi
P; Zambrzycki
SC; Wallace
WT; Gazda
DB; Limero
TF; Symonds
JM; Orlando
TM; Macatangay
A; Fernandez
Abstract: Low molecular weight polar organics are commonly observed in spacecraft environments. Increasing concentrations of one or more of these contaminants can negatively impact Environmental Control and Life Support (ECLS) systems and/or the health of crew members, posing potential risks to the success of manned space missions. Ambient plasma ionization mass spectrometry (MS) is finding effective use as part of the analytical methodologies being tested for next-generation space module environmental analysis. However, ambient ionization methods employing atmospheric plasmas typically require relatively high operation voltages and power, thus limiting their applicability in combination with fieldable mass spectrometers. In this work, we investigate the use of a low power microplasma device in the microhollow cathode discharge (MHCD) configuration for the analysis of polar organics encountered in space missions. A metal-insulator-metal (MIM) structure with molybdenum foil disc electrodes and a mica insulator was used to form a 300 mu m diameter plasma discharge cavity. We demonstrate the application of these MIM microplasmas as part of a versatile miniature ion source for the analysis of typical volatile contaminants found in the International Space Station (ISS) environment, highlighting their advantages as low cost and simple analytical devices.
Subject: Plasma Ionization
Microhollow Cathode Discharge
Direct Analysis In Real-time
Ion Source Miniaturization
Air Quality Monitoring
Citation: Journal Of The American Society For Mass Spectrometry. SPRINGER, n. 27, n. 7, p. 1203 - 1210.
Rights: fechado
Identifier DOI: 10.1007/s13361-016-1388-y
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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