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Article
Potential Applications Of HS-SPME/GC In Oxidized Vegetable Oils.
Journal of Food Science and Engineering (2012)
  • Gulgun YILDIZ TİRYAKİ
Abstract

Headspace solid phase microextraction chromatography (HS-SPME/GC) was evaluated as a tool in determining the rate of oxidation in oxidized soybean oil samples by measuring the production of hexanal as a secondary major volatile breakdown product of linoleic acid. Samples of the headspace taken from sealed 20 mL vials, incubated 30 min at 50 °C followed by 5 min adsorption, were injected into a gas chromatograph with 2 min thermal desorption. In applying SPME, different analytical conditions were evaluated. The linearity of response of the volatiles for the HS-SPME/GC procedure using a carboxen-polydimethylsiloxane fiber was determined from 3 g of mineral oil spiked with a hexanal standard solution at different levels. Using the optimized extraction conditions, an R value close to unity (R = 0.999) was found, and the repeatability (n = 11) was 6.31%. The results indicated that hexanal is linearly related to peroxide value (PV) only intermediate PV ranges (10-18 meq/kg). The study also showed that HS-SPME/GC procedure was a simple and reproducible method for the analysis of hexanal in the HS of commercial soybean oil samples, and is useful as a quality control and research tool for the evaluation of flavor quality and shelf life of vegetable oils.

Keywords
  • Hexanal,
  • headspace,
  • GC,
  • solid phase microextraction,
  • peroxide value,
  • oxidation,
  • vegetable oil.
Disciplines
Publication Date
2012
Citation Information
Gulgun YILDIZ TİRYAKİ. "Potential Applications Of HS-SPME/GC In Oxidized Vegetable Oils." Journal of Food Science and Engineering Vol. 2 Iss. 5 (2012)
Available at: http://works.bepress.com/gulgun_yildiz_tiryaki/7/