Rapid and Simultaneous Analysis of Free Sterols, Tocopherols, and Squalene in Edible Oils by Coupled Reversed-Phase Liquid Chromatography−Gas Chromatography

Rapid and Simultaneous Analysis of Free Sterols, Tocopherols, and Squalene in Edible Oils by Coupled Reversed-Phase Liquid Chromatography−Gas Chromatography

On-line coupling of reversed-phase liquid chromatography and gas capillary chromatography (RPLC-GC) using a programmed temperature vaporizer (PTV) as interface is used for the direct and simultaneous analysis of free sterols, tocopherols, and squalene of edible oils by direct injection (that is, wit...

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Veröffentlicht in:Journal of agricultural and food chemistry 1998-04, Vol.46 (4), p.1419-1422
Hauptverfasser: Villén, Jesús, Blanch, Gracia P, Ruiz del Castillo, María Luisa, Herraiz, Marta
Format: Artikel
Sprache:eng
Schlagworte:
ANALYTICAL METHODS
Biological and medical sciences
DATA PROCESSING
Fat industries
FOOD ANALYSIS
Food industries
FOODS
Fundamental and applied biological sciences. Psychology
GAS CHROMATOGRAPHY
HPLC
OLIVE OIL
ON LINE
PLANT OILS
PROCESSING
RAPESEED OIL
RAPID METHODS
SAMPLING
SCREENING
STEROLS
TESTING
TOCOPHEROLS
TRITERPENOIDS
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Zusammenfassung:On-line coupling of reversed-phase liquid chromatography and gas capillary chromatography (RPLC-GC) using a programmed temperature vaporizer (PTV) as interface is used for the direct and simultaneous analysis of free sterols, tocopherols, and squalene of edible oils by direct injection (that is, without the need for prior enrichment of the sample). The proposed method allows large volume fractions of water methanol eluents to be transferred into the GC system, 2000 μL/min being the speed of sample introduction. The overall procedure including LC preseparation, transfer from LC to GC, and GC analysis takes
ISSN:0021-8561
1520-5118
DOI:10.1021/jf970706l