Document Detail

Gas chromatographic analysis of volatile sulfur compounds from heated milk using static headspace sampling.
MedLine Citation:
PMID:  1401363     Owner:  NLM     Status:  MEDLINE    
An investigation was conducted to test the feasibility of using gas chromatography with static headspace sampling as an objective tool to measure milk flavor quality. Heated milk off-flavor was chosen for study. Different strategies were tried for increasing the sensitivity of a commercially available headspace method, including salting out with sodium sulfate, cryofocusing during injection, and applying backpressure to the sampling loop. With the aid of a sulfur-specific detector, the resulting system was sufficiently sensitive to detect the sulfur volatiles, H2S and dimethyl sulfide, at the concentrations found in pasteurized skim milk. Milk that was heated to varying degrees was analyzed, and the analytical results were compared with the intensity of heated flavor as determined by a sensory panel. For skim milk, correlations were moderately strong: Spearman's correlation coefficients for H2S and dimethyl sulfide were .75 and .60, respectively. Correlations were weak for whole milk.
K R Christensen; G A Reineccius
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  75     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1992 Aug 
Date Detail:
Created Date:  1992-10-29     Completed Date:  1992-10-29     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2098-104     Citation Subset:  IM    
Department of Food Science and Nutrition, University of Minnesota, St. Paul 55108.
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MeSH Terms
Chromatography, Gas / methods*
Hot Temperature*
Hydrogen Sulfide / analysis
Milk / analysis*
Quality Control
Sulfides / analysis
Sulfur / analysis*
Reg. No./Substance:
0/Sulfides; 75-18-3/dimethyl sulfide; 7704-34-9/Sulfur; 7783-06-4/Hydrogen Sulfide

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