Estimation of Individual C8 to C10 Aromatic Hydrocarbons in Naphthas and Motor Gasolines by Capillary Gas Chromatography

Kumar, B. Ravi; Kuchhal, R. K.; Kumar, Pradeep; Gupta, Poonam

doi:10.1093/chromsci/24.3.99

Cited by 20 publications

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“…Identified pyrolysis products are as follows: BTEX, alkylated monoaromatics, naphthalene and C1 to C3 methylated naphthalenes, and phenanthrene and C1 to C4 methylated phenanthrenes. All of these are found in gasoline and light oils (41). These hydrocarbons are not contaminants that are extractable by organic solvents but are partitioned into HPO-A structures and are released during pyrolysis (unpublished research).…”

Section: Resultsmentioning

confidence: 99%

Terpenoids as Major Precursors of Dissolved Organic Matter in Landfill Leachates, Surface Water, and Groundwater

Leenheer

Nanny

McIntyre

2003

Environ. Sci. Technol.

139

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13C NMR analyses of hydrophobic dissolved organic matter (DOM) fractions isolated from a landfill leachate contaminated groundwater near Norman, OK; the Colorado River aqueduct near Los Angeles, CA; Anaheim Lake, an infiltration basin for the Santa Ana River in Orange County, CA; and groundwater from the Tomago Sand Beds, near Sydney, Australia, found branched methyl groups and quaternary aliphatic carbon structures that are indicative of terpenoid hydrocarbon precursors. Significant amounts of lignin precursors, commonly postulated to be the major source of DOM, were found only in trace quantities by thermochemolysis/gas chromatography/mass spectrometry of the Norman Landfill and Tomago Sand Bed hydrophobic DOM fractions. Electrospray/tandem mass spectrometry of the Tomago Sand Bed hydrophobic acid DOM found an ion series differing by 14 daltons, which is indicative of aliphatic and aryl-aliphatic polycarboxylic acids. The product obtained from ozonation of the resin acid, abietic acid, gave a similar ion series. Terpenoid precursors of DOM are postulated to be derived from resin acid paper sizing agents in the Norman Landfill, algal and bacterial terpenoids in the Colorado River and Anaheim Lake, and terrestrial plant terpenoids in the Tomago Sand Beds.

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Section: Resultsmentioning

confidence: 99%

Terpenoids as Major Precursors of Dissolved Organic Matter in Landfill Leachates, Surface Water, and Groundwater

Leenheer

Nanny

McIntyre

2003

Environ. Sci. Technol.

139

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Determination of traces of aromatic compounds in multicomponent mixtures by HRCGC

Matisová

Kubuš

Juranyiová

1991

J. High Resol. Chromatogr.

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Key Words:Capillary GC Off-line LC preseparation Trace analysis Aromatic compounds in an n-alkane matrix SummaryThe possibilities and difficulties of trace analysis of highly complex organic mixtures has been demonstrated by the analysis of traces of numerous aromatic substances in an n-alkane matrix with a boiling point range of 151-270°C. Single column high resolution capillary gas chromatography (under optimized conditions) was performed after an off-line LC preseparation step which had been evaluated using a model mixture.Gas chromatographic quantitation of the 191 aromatic compounds identified was performed with an internal standard; following splitless injection and separation on a polydimethylsiloxane column under temperature-programmed conditions the compounds were detected by flame ionization. The response factors of aromatic hydrocarbons at trace levels were verified and the precision and reproducibility both of the GC determination and the overall analysis, including preseparation, were studied.Percentage by weight of individual aromatic compounds (mainly alkylbenzenes, indanes, naphthalenes, and acenaphthenes) was in the range lo9 to

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High resolution capillary gas chromatography of aromatic compounds in multicomponent hydrocarbon mixtures

Matisová

1992

J. High Resol. Chromatogr.

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The scope of the principal techniques employed for the analysis of hydrocarbon mixtures is discussed, with emphasis on the analysis of one and two ring aromatic compounds by single column capillary gas chromatography. The paper considers both the column and the selection of the temperature regime (isothermal and temperature programmed). Much space is devoted to the characterization of the compounds by means of retention data.

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Estimation of Individual C8 to C10 Aromatic Hydrocarbons in Naphthas and Motor Gasolines by Capillary Gas Chromatography

Cited by 20 publications

References 0 publications

Terpenoids as Major Precursors of Dissolved Organic Matter in Landfill Leachates, Surface Water, and Groundwater

Terpenoids as Major Precursors of Dissolved Organic Matter in Landfill Leachates, Surface Water, and Groundwater

Determination of traces of aromatic compounds in multicomponent mixtures by HRCGC

High resolution capillary gas chromatography of aromatic compounds in multicomponent hydrocarbon mixtures

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