2009
DOI: 10.1080/10916460802686749 View full text |Buy / Rent full text
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Abstract: Three diverse middle distillate fuels from Mobile, Alabama, Jacksonville, Florida, and Kirachi, Pakistan were analyzed to quantify the organic nitrogen compound distribution in each. Organo-nitrogen compounds were isolated by a mild acid extraction followed by a silica-gel adsorption procedure. The extraction process yielded three extracts for each fuel: a basic nitrogen extract in methylene chloride, a nonbasic nitrogen extract in methylene chloride, and a nonbasic nitrogen extract in methanol. The major comp… Show more

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“…Basic N species usually include pyridines, quinolines, benzoquinolines, and their alkylated derivatives. Extraction and concentration of N compounds have been performed by either liquid/ liquid extraction (LLE) 12 or solid-phase extraction (SPE), 13,14 although the quantitative fractionation of neutral and basic N compounds is subject to continuing research. 15 Several methods involving petroleum and petroleum product analysis of N-containing compounds have been developed using a variety of analytical techniques.…”
Section: Introductionmentioning
“…15 Several methods involving petroleum and petroleum product analysis of N-containing compounds have been developed using a variety of analytical techniques. These include gas chromatography coupled to mass spectrometry (GC/ MS), 12,14 GC equipped with a pulsed flame photometric detector (GC-PFPD) and ammonia chemical ionization MS, 16 particle beam liquid chromatography/MS (LC/MS), [17][18][19] mass spectrometry with atmospheric pressure chemical ionization, 20 positive-ion electrospray ionization MS (ESI þ ), 21 time-of-flight secondary ion MS (TOF SIMS) 22 and electron ionization, field desorption ionization, and electrospray ionization Fourier transform ion cyclotron resonance MS (FT-ICR MS). 8 Although several fractionation steps and the most powerful analytical instrumentation may be employed, it is still not possible to speciate (separate) all N-containing compounds in petroleum samples.…”
Section: Introductionmentioning