Flavor Threshold for Acetaldehyde in Milk, Chocolate Milk, and Spring Water Using Solid Phase Microextraction Gas Chromatography for Quantification

The detection threshold of acetaldehyde was determined on whole, lowfat, and nonfat milks, chocolate-flavored milk, and spring water. Knowledge of the acetaldehyde threshold is important because acetaldehyde forms in milk during storage as a result of light oxidation. It is also a degradation produc...

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Bibliographic Details
Published inJournal of agricultural and food chemistry Vol. 49; no. 3; pp. 1377 - 1381
Main Authors van Aardt, Marleen, Duncan, Susan E, Bourne, Dianne, Marcy, Joseph E, Long, Timothy E, Hackney, Cameron R, Heisey, Cheryl
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 19.03.2001
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Summary:The detection threshold of acetaldehyde was determined on whole, lowfat, and nonfat milks, chocolate-flavored milk, and spring water. Knowledge of the acetaldehyde threshold is important because acetaldehyde forms in milk during storage as a result of light oxidation. It is also a degradation product of poly(ethylene terephthalate) during melt processing, a relatively new packaging choice for milk and water. There was no significant difference in the acetaldehyde threshold in milk of various fat contents, with thresholds ranging from 3939 to 4040 ppb. Chocolate-flavored milk and spring water showed thresholds of 10048 and 167 ppb, respectively, which compares favorably with previous studies. Solid phase microextraction (SPME) was verified as an effective method for the recovery of acetaldehyde in all media with detection levels as low as 200 and 20 ppb in milk and water, respectively, when using a polydimethyl siloxane/Carboxen SPME fiber in static headspace at 45 °C for 15 min. Keywords: Acetaldehyde; milk; threshold; fat content; solid phase microextraction
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ISSN:0021-8561
1520-5118
DOI:10.1021/jf001069t