Monitoring Acetaldehyde Concentrations during Micro-oxygenation of Red Wine by Headspace Solid-Phase Microextraction with On-Fiber Derivatization
| Autor: | Alam S. Hasson, Kenneth C. Fugelsang, Barry H. Gump, William K Carlton |
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| Rok vydání: | 2007 |
| Předmět: |
Wine
Chromatography Gas Chromatography Food Handling Aging of wine Acetaldehyde Context (language use) General Chemistry Solid-phase microextraction law.invention Oxygen chemistry.chemical_compound chemistry law Flame ionization detector Gas chromatography General Agricultural and Biological Sciences Derivatization |
| Zdroj: | Journal of Agricultural and Food Chemistry. 55:5620-5625 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/jf070243b |
| Popis: | An analytical method was developed to quantify levels of acetaldehyde in wine samples. The method utilizes headspace solid-phase microextraction with on-fiber derivatization using O-(pentafluorobenzyl)hydroxylamine and quantification by gas chromatography with flame ionization detection. The technique showed good sensitivity and reproducibility in samples of Chardonnay, Petite Sirah, and Merlot wines containing acetaldehyde at levels below the sensory threshold (40-100 ppm). The method was used to monitor acetaldehyde concentrations during the micro-oxygenation of Merlot wine in a 141 L pilot-plant experiment and a 2400 L full-scale study. In both experiments, levels of acetaldehyde remained constant for several weeks before increasing at rates of the order of 1 ppm/day. Variations in the levels of acetaldehyde present are discussed within the context of the underlying chemical reactions. |
| Databáze: | OpenAIRE |
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