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Determination of ethylphenol compounds in wine by headspace solid-phase microextraction in conjunction with gas chromatography and flame ionization detection

Monje, Marie-Carmen and Privat, Christelle and Gastine, Valérie and Nepveu, Françoise Determination of ethylphenol compounds in wine by headspace solid-phase microextraction in conjunction with gas chromatography and flame ionization detection. (2002) Analytica Chimica Acta, 458 (1). 111-117. ISSN 0003-2670

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Official URL: https://doi.org/10.1016/S0003-2670(01)01528-8

Abstract

Headspace solid phase microextraction (HS-SPME) was investigated as a solvent-free alternative method for the extraction and determination of 4-ethylphenol (EP) and 4-ethylguaiacol (EG) in red wine by capillary gas chromatography with flame ionization detection (FID) and compared to liquid–liquid extraction. For HS-SPME, better results were obtained with saturated sodium chloride samples, at 55°C, using a 85μm polyacrylate fiber. An absorption time of 40min was needed to reach the absorption equilibrium for EG. This 40-min duration corresponds to the beginning of EP equilibrium and was selected for the experiments. In these conditions, the calibration graphs were linear in the range 5–5000μgl−1 and the sensitivity was nearly the same for the two compounds. The detection limits were in the low μgl−1 range. In model wine solutions, result obtained with the liquid–liquid extraction method exhibit a linear calibration between 25 and 10,000μgl−1 with a detection limit of 1μgl−1, but, the relative standard deviations of the EP and EG result in the low concentration range (<50μgl−1) are higher than those obtained by HS-SPME (15% compared to 2% for EP and 12% compared to 5% for EG). Taking into account the numerous volatile compounds in wine, HS-SPME is a rapid and valid alternative technique for use in the determination of ethylphenols at trace levels.

Item Type:Article
HAL Id:hal-02064210
Audience (journal):International peer-reviewed journal
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Institution:Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Loetitia MOYA
Deposited On:11 Mar 2019 16:01

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