Document Detail

Monitoring acetaldehyde concentrations during micro-oxygenation of red wine by headspace solid-phase microextraction with on-fiber derivatization.
MedLine Citation:
PMID:  17567026     Owner:  NLM     Status:  MEDLINE    
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.
William K Carlton; Barry Gump; Kenneth Fugelsang; Alam S Hasson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-06-13
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  55     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-07-03     Completed Date:  2007-09-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5620-5     Citation Subset:  IM    
Department of Enology and Viticulture, California State University Fresno, 2555 East San Ramon Avenue, Fresno, California 93740, USA.
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MeSH Terms
Acetaldehyde / analysis*
Chromatography, Gas
Food Handling / methods
Oxygen / administration & dosage*
Wine / analysis*
Reg. No./Substance:
75-07-0/Acetaldehyde; 7782-44-7/Oxygen

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