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Food Chem

Title:		Identification of sulphur volatiles and GC-olfactometry aroma profiling in two fresh tomato cultivars
Author(s):		Du X; Song M; Baldwin E; Rouseff R;
Address:		"Citrus Research and Education Centre, University of Florida, 700 Experiment Station Road, Lake Alfred, FL 33850, USA. Electronic address: xiaofendu09@gmail.com. Citrus Research and Education Centre, University of Florida, 700 Experiment Station Road, Lake Alfred, FL 33850, USA. Citrus and Other Subtropical Products, Horticultural Research Laboratory, USDA-ARS, Ft. Pierce, FL 33881, USA"
Journal Title:		Food Chem
Year:		2015
Volume:		20140916
Issue:
Page Number:		306 - 314
DOI:		10.1016/j.foodchem.2014.09.013
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"Ten sulphur volatiles were observed in two Florida tomato cultivars ('Tasti-Lee' and 'FL 47') harvested at three maturity stages (breaker, turning, and pink) using gas chromatography with a pulsed flame photometric detector (GC-PFPD). Eight PFPD peaks were identified using retention values from authentic sulphur standards and GC-MS characteristic masses. Seven were quantified using an internal standard combined with external calibration curves. Dimethyl sulphide, dimethyl disulphide, dimethyl trisulphide 2-propylthiazole and 2-s-butylthiazole were newly identified in fresh tomatoes. Principal component analysis of sulphur volatiles indicated that there were appreciable maturity stage differences clustered in separate quadrants. GC-olfactometry (GC-O) identified 50 aroma-active compounds in 'Tasti-Lee', with 10 reported as odorants in fresh tomatoes for the first time. Four sulphur volatiles exhibited aroma activity, including two of the newly-reported fresh tomato sulphur volatiles, 2-s-butylthiazole and dimethyl sulphide. GC-O aroma profiling indicated that the most intense aroma category was earthy-musty, followed by fruity-floral, green-grassy, sweet-candy and sweaty-stale-sulphurous"
Keywords:		"Chromatography, Gas/*methods Fruit/*chemistry/growth & development Gas Chromatography-Mass Spectrometry Solanum lycopersicum/*chemistry Odorants/*analysis *Olfactometry Smell Sulfur Compounds/*analysis Volatile Organic Compounds/analysis Fl 47 Tasti-Lee T;"
Notes:		"MedlineDu, Xiaofen Song, Mei Baldwin, Elizabeth Rouseff, Russell eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2014/10/14 Food Chem. 2015 Mar 15; 171:306-14. doi: 10.1016/j.foodchem.2014.09.013. Epub 2014 Sep 16"