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Issue 13, 2013
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In situ analysis of corrosion inhibitors using a portable mass spectrometer with paper spray ionization

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Abstract

Paper spray (PS) ambient ionization is implemented using a portable mass spectrometer and applied to the detection of alkyl quaternary ammonium salts in a complex oil matrix. These salts are commonly used as active components in the formulation of corrosion inhibitors. They were identified in oil and confirmed by their fragmentation patterns recorded using tandem mass spectrometry (MS/MS). The cations of alkyl and benzyl-substituted quaternary ammonium salts showed characteristic neutral losses of CnH2n (n carbon number of the longest chain) and C7H8, respectively. Individual quaternary ammonium compounds were detected at low concentrations (<1 ng μL−1) and over a dynamic range of ∼5 pg μL−1 to 500 pg μL−1 (ppb). Direct detection of these compounds in complex oil samples without prior sample preparation or pre-concentration was also demonstrated using a home-built miniature mass spectrometer at levels below 1 ng μL−1.

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

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Publication details

The article was received on 31 Jan 2013, accepted on 09 May 2013 and first published on 09 May 2013


Article type: Paper
DOI: 10.1039/C3AN00249G
Citation: Analyst, 2013,138, 3740-3748
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    In situ analysis of corrosion inhibitors using a portable mass spectrometer with paper spray ionization

    Fred. P. M. Jjunju, A. Li, A. Badu-Tawiah, P. Wei, L. Li, Z. Ouyang, I. S. Roqan and R. G. Cooks, Analyst, 2013, 138, 3740
    DOI: 10.1039/C3AN00249G

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