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Related Experiment Videos

Profiling flavor compounds of potato crisps during storage using solid-phase microextraction.

A Sanches-Silva1, J Lopez-Hernández, P Paseiro-Losada

  • 1Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Pharmacy, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.

Journal of Chromatography. A
|March 3, 2005
PubMed
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Headspace solid-phase microextraction (HS-SPME) offers a solvent-free method for analyzing volatile compounds in potato crisps. This technique effectively identified 31 compounds derived from lipid and carbohydrate degradation in oxidized samples.

Area of Science:

  • Food Chemistry
  • Analytical Chemistry
  • Separation Science

Background:

  • Volatile compounds in food products are crucial indicators of quality and degradation.
  • Traditional extraction methods often involve solvents, posing environmental and safety concerns.
  • Stored potato crisps are susceptible to oxidative changes affecting their volatile profile.

Purpose of the Study:

  • To evaluate Headspace Solid-Phase Microextraction (HS-SPME) as a solvent-free technique for volatile compound analysis in potato crisps.
  • To optimize HS-SPME parameters for efficient extraction of volatile compounds.
  • To characterize the volatile profile of oxidized potato crisps.

Main Methods:

  • Headspace Solid-Phase Microextraction (HS-SPME) using a divinylbenzene (DVB)-carboxen (CAR)-polydimethylsiloxane fiber.

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  • Optimized extraction temperature at 70°C.
  • Capillary gas chromatography coupled with mass spectrometry (GC-MS) for compound identification.

    • Main Results:

    • Optimal extraction achieved with a DVB-CAR-PDMS fiber at 70°C.
    • Equilibrium and extraction times optimized to 5 min and 20 min, respectively.
    • Identified 31 volatile compounds in oxidized potato crisps, primarily from lipid and carbohydrate degradation.

    Conclusions:

    • HS-SPME is a viable and efficient solvent-free alternative for analyzing volatile compounds in potato crisps.
    • The method allows for effective characterization of degradation products in oxidized samples.
    • Further application of HS-SPME can aid in quality control and understanding of food staling processes.