In situ monitoring of electrochemical reactions through CNT-assisted paper cell mass spectrometry

The Analyst
Rahul NarayananThalappil Pradeep

Abstract

A novel method of coupling electrochemistry (EC) with mass spectrometry (MS) is illustrated with a paper-based electrochemical cell supported by carbon nanotubes (CNTs). The electrochemically formed ions, created at appropriate electrochemical potentials, are ejected into the gas phase from the modified paper, without the application of additional potential. The electrochemical cell was fabricated by using a rectangular CNT-coated Whatman 42 filter paper with printed electrodes, using silver paste. This was used for studying the electrochemical conversion of thiols to disulfides, and the functionalization of polycyclic aromatic hydrocarbons (PAHs), which involve S-S and C-C bond formations, respectively. We also demonstrate the versatility of the set-up by utilizing it for the detection of radical cations of metallocenes, monitoring the oxidation of sulfides through the detection of reactive intermediates, and the detection of radical cations of PAHs, all of which occur at specific applied potentials. Finally, the applicability of this technique for qualitative and quantitative analyses of environmentally relevant molecules has been demonstrated by studying the electrochemical oxidation of glucose (Glu) to gluconic acid (GlcA) ...Continue Reading

References

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Jun 3, 2009·Analytical Chemistry·Wijitar DungchaiCharles S Henry
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Jul 14, 2012·Analytical Chemistry·Dmitry MomotenkoHubert H Girault
Jul 31, 2013·The Analyst·Pengyuan LiuHao Chen
Mar 20, 2014·Angewandte Chemie·Rahul NarayananThalappil Pradeep
Jun 15, 2014·Analytica Chimica Acta·Helene FaberUwe Karst
Nov 7, 2014·Analytical Chemistry·David M CateCharles S Henry
Aug 28, 2015·Journal of the American Society for Mass Spectrometry·Yao-Min Liu, Richard H Perry
Oct 13, 2015·Analytical Chemistry·Rahul NarayananThalappil Pradeep
Mar 10, 2018·Analytical Chemistry·Pallab BasuriThalappil Pradeep
Apr 21, 2018·Occupational and Environmental Medicine·Ganesan VelmuruganThalappil Pradeep

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Citations

Nov 28, 2020·Journal of Mass Spectrometry : JMS·Xiaowei SongRichard N Zare
Mar 11, 2021·ChemPlusChem·Dallas FreitasXin Yan
Nov 18, 2020·Journal of the American Society for Mass Spectrometry·Pallab BasuriThalappil Pradeep

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