Automated flow injection analyzer with on-line solid-phase extraction and chemiluminescence detection for the determination of dodecylamine in diesel fuels

Philip J. Fletcher, Kevin N. Andrew, Stuart Forbes, Paul J. Worsfold

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Abstract

This paper describes the development of a portable, automated flow injection-chemiluminescence (FI-CL) analyzer incorporating on-line solid-phase extraction (SPE) for the determination of dodecylamine (detergent) in diesel fuels. The method is based on the peroxyoxalate/ sulforhodamine 101 chemiluminescence reaction, with SPE required to remove indigenous compounds within the diesel fuel matrix that interfere with the CL response. The automated analyzer achieved a detection limit of 2.9 mg L-1 and a linear range of 2.9 - 50 mg L-1, which was suitable for determinations of dodecylamine at levels typically present in fully formulated diesel fuels (40 mg L-1). Analyses of base fuels from five different sources demonstrated that an automated FI-CL-SPE system could provide a portable instrument for monitoring the presence/absence of dodecylamine in diesel fuels.

Original languageEnglish
Pages (from-to)2618-2625
Number of pages8
JournalAnalytical Chemistry
Volume75
Issue number11
DOIs
Publication statusPublished - 1 Jun 2003

ASJC Scopus subject areas

  • Analytical Chemistry

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