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

Fred Paul Mark Jjunju, Anyin Li, Abraham K. Badu-Tawiah, Pu Wei, Linfan Li, Zheng Ouyang, Iman S. Roqan, Robert Graham Cooks

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

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.© 2013 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)3740
JournalThe Analyst
Volume138
Issue number13
DOIs
StatePublished - 2013

ASJC Scopus subject areas

  • Biochemistry
  • Spectroscopy
  • Environmental Chemistry
  • Analytical Chemistry
  • Electrochemistry

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