Simultaneous determination of tocopherols and tocotrienols in hazelnuts by a normal phase liquid chromatographic method

JS Amaral, S Casal, D Torres, RM Seabra… - Analytical …, 2005 - jstage.jst.go.jp
JS Amaral, S Casal, D Torres, RM Seabra, BPP Oliveira
Analytical Sciences, 2005jstage.jst.go.jp
A normal-phase high-performance liquid chromatography (NP-HPLC) method for the
determination of tocopherols and tocotrienols in hazelnuts is reported. Three extraction
procedures (with and without saponification) were assayed; the best results were obtained
with a simple solid–liquid extraction procedure. Chromatographic separation was achieved
using an Inertsil 5 SI column using isocratic elution with hexane/1, 4-dioxane (95.5: 4.5, v/v)
at a flow rate of 0.7 mL/min. The effluent was monitored by a series arrangement of a diode …
A normal-phase high-performance liquid chromatography (NP-HPLC) method for the determination of tocopherols and tocotrienols in hazelnuts is reported. Three extraction procedures (with and without saponification) were assayed; the best results were obtained with a simple solid–liquid extraction procedure. Chromatographic separation was achieved using an Inertsil 5 SI column using isocratic elution with hexane/1, 4-dioxane (95.5: 4.5, v/v) at a flow rate of 0.7 mL/min. The effluent was monitored by a series arrangement of a diode-array followed by a fluorescence detector. All compounds were separated in a short period of time (17 min). The method proved to be rapid, sensitive, reproducible and accurate, allowing the simultaneous determination of all vitamin E homologues.
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