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Food Chem

Title:		"Approaches of aroma extraction dilution analysis (AEDA) for headspace solid phase microextraction and gas chromatography-olfactometry (HS-SPME-GC-O): Altering sample amount, diluting the sample or adjusting split ratio?"
Author(s):		Feng Y; Cai Y; Sun-Waterhouse D; Cui C; Su G; Lin L; Zhao M;
Address:		"College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China. College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China; School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand. College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China. Electronic address: femmzhao@scut.edu.cn"
Journal Title:		Food Chem
Year:		2015
Volume:		20150403
Issue:
Page Number:		44 - 52
DOI:		10.1016/j.foodchem.2015.03.138
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"Aroma extract dilution analysis (AEDA) is widely used for the screening of aroma-active compounds in gas chromatography-olfactometry (GC-O). In this study, three aroma dilution methods, (I) using different test sample volumes, (II) diluting samples, and (III) adjusting the GC injector split ratio, were compared for the analysis of volatiles by using HS-SPME-AEDA. Results showed that adjusting the GC injector split ratio (III) was the most desirable approach, based on the linearity relationships between Ln (normalised peak area) and Ln (normalised flavour dilution factors). Thereafter this dilution method was applied in the analysis of aroma-active compounds in Japanese soy sauce and 36 key odorants were found in this study. The most intense aroma-active components in Japanese soy sauce were: ethyl 2-methylpropanoate, ethyl 2-methylbutanoate, ethyl 3-methylbutanoate, ethyl 4-methylpentanoate, 3-(methylthio)propanal, 1-octen-3-ol, 2-methoxyphenol, 4-ethyl-2-methoxyphenol, 2-methoxy-4-vinylphenol, 2-phenylethanol, and 4-hydroxy-5-ethyl-2-methyl-3(2H)-furanone"
Keywords:		"Aldehydes/analysis Chromatography, Gas/*methods Female Furans/analysis Guaiacol/analogs & derivatives/analysis Humans Indicator Dilution Techniques Male Octanols/analysis Odorants/*analysis Olfactometry/*methods Phenylethyl Alcohol/analysis Propionates/an;"
Notes:		"MedlineFeng, Yunzi Cai, Yu Sun-Waterhouse, Dongxiao Cui, Chun Su, Guowan Lin, Lianzhu Zhao, Mouming eng Research Support, Non-U.S. Gov't England 2015/05/16 Food Chem. 2015 Nov 15; 187:44-52. doi: 10.1016/j.foodchem.2015.03.138. Epub 2015 Apr 3"