Analysis of neutral nitrogen compounds in diesel oil by direct injection high-performance liquid chromatography-mass spectrometry-ultraviolet spectrometry methods

John Mao, Carlos R. Pacheco, Daniel D. Traficante, William Rosen

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

An analytical methodology has been developed for the direct analysis of neutral nitrogen compounds in diesel oil by HPLC with subsequent detection using MS and/or photodiode-array UV spectrometry. By diluting diesel oils with one volume of hexane, diesel samples could be injected directly onto an alumina analytical column and then eluted with a gradient mobile phase consisting of hexane and dioxane. Nitrogen compounds were selectively retained on the alumina column, eluted using LC, and then detected by particle beam LC-MS or UV at 254, 270 and 290 nm. Two Brazilian and one Arabian diesel distillates were investigated. Alkylcarbazoles and alkylindoles were identified as the major neutral nitrogen components. Structural identification was accomplished by combination of electron impact MS and UV analyses. The concentration of carbazoles and indoles was estimated using calibration standards of carbazole and indole, respectively.

Original languageEnglish (US)
Pages (from-to)103-111
Number of pages9
JournalJournal of Chromatography A
Volume684
Issue number1
DOIs
StatePublished - Oct 28 1994

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

Fingerprint Dive into the research topics of 'Analysis of neutral nitrogen compounds in diesel oil by direct injection high-performance liquid chromatography-mass spectrometry-ultraviolet spectrometry methods'. Together they form a unique fingerprint.

  • Cite this