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Determination of basic nitrogen-containing polycyclic aromatic compounds (azaarenes) in petroleum and petroleum products

Bestimmung basischer Stickstoff-haltiger polycyclischer aromatischer Verbindungen (Azaarene) in Erdöl und Mineralölprodukten

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Zusammenfassung

Nach einer selektiven Anreicherung durch Flüssig-Flüssig-Verteilung (Dimethylformamid/ Wasser/Cyclohexan, 9∶1∶10; DMF/Wasser/Benzol, 3∶7∶10) und Ionenaustauscher-Chromatographie (SP Sephadex C 25) wurde die basische Fraktion einer Ölprobe capillargas-chromatographisch getrennt. Das Anreicherungsverfahren liefert eine Azaarenfraktion, die ausschließlich aus Stickstoff-haltigen Verbindungen besteht, was durch einen Vergleich der mit dem FID und N-FID registrierten Gas-Chromatogramme gezeigt werden konnte. Die Variationskoeffizienten einer mehrfach wiederholten Probenserie (Arabian Light, n=5) ergab für 8 ausgewählte Azaarene Werte zwischen 4,7 und 6,7%.

Summary

After a selective enrichment including liquid-liquid-partition (dimethylformamide/water/cyclohexane, 9∶1∶10; DMF/water/benzene, 3∶7∶10) and ion-exchange chromatography (SP Sephadex C 25), a basic fraction of a crude oil sample was analysed by capillary gas-chromatography. The enrichment procedure results in an azaarene fraction consisting exclusively of nitrogen-containing compounds as confirmed by a comparison of the chromatograms recorded by FID and a nitrogen-specific detector (N-FID). The coefficients of variation for a series of a several times (n=5) repeated analysis of 8 selected azaarenes from an Arabian Light sample were found to be between 4.7 and 6.7%.

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Authors and Affiliations

  1. Biochemisches Institut für Umweltcarcinogene, Sieker Landstraße 19, D-2070, Ahrensburg, Federal Republic of Germany

    G. Grimmer & K. -W. Naujack

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  1. G. Grimmer
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  2. K. -W. Naujack
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Grimmer, G., Naujack, K.W. Determination of basic nitrogen-containing polycyclic aromatic compounds (azaarenes) in petroleum and petroleum products. Z. Anal. Chem. 321, 27–31 (1985). https://doi.org/10.1007/BF00464482

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  • DOI: https://doi.org/10.1007/BF00464482

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