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  • 1
    Digitale Medien
    Digitale Medien
    On-line coupling of liquid chromatography, capillary gas chromatography and mass spectrometry for the determination and identification of polycyclic aromatic hydrocarbons in vegetable oils (1991)
    Springer
    Chromatographia 31 (1991), S. 113-118 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Coupled LC-GC-MS ; Polycyclic aromatic hydrocarbons ; Vegetable oil samples
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary An on-line combination of liquid chromatography, gas chromatography and mass spectrometry has been realized by coupling a quadrupole mass spectrometer to an LC-GC apparatus. Liquid chromatography was used for sample pretreatment of oil samples of different origin. The appropriate LC fraction, containing polycyclic aromatic hydrocarbons, was transferred to the gas chromatograph using a loop-type interface. After solvent evaporation through the solvent vapour exit and subsequent GC separation, the compounds were introduced into the mass spectrometer for detection and identification. The GC column was connected to a short piece of deactivated fused silica that protruded into the ion source. The total analytical set-up allowed the direct analysis of oil samples after dilution in n-pentane without any sample clean-up. Detection limits are about 40 pg in the full scan mode and about 1 pg with selective ion monitoring, i.e. 20 ppb and 0.5 ppb respectively.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02274556
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  • 2
    Digitale Medien
    Digitale Medien
    Effect of some parameters on the liquid chromatographic separation of biogenic amines and their metabolites (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 444-447 
    Details
    ISSN: 0935-6304
    Schlagwort(e): Liquid chromatography ; Reversed-phase ion-pair system ; Biogenic amines and metabolites ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The liquid chromatographic separation of some biogenic amines and their metabolites with a reversed-phase ion-pair system has been optimized. The effects of the nature of the stationary phase, the column temperature, the pH, and the ion-pair reagent concentration of the mobile phase have been investigated. The most striking result is the influence of the column temperature on selectivity.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jhrc.1240040904
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