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J Sci Food Agric

Title:		Comparison of techniques for the isolation of volatiles from cashew apple juice
Author(s):		Sampaio KL; Biasoto AC; Da Silva MA;
Address:		"Department of Food and Nutrition, University of Campinas (UNICAMP), Rua Monteiro Lobato, 80, CEP 13083-862, Campinas, SP, Brazil"
Journal Title:		J Sci Food Agric
Year:		2015
Volume:		20140530
Issue:		2
Page Number:		299 - 312
DOI:		10.1002/jsfa.6718
ISSN/ISBN:		1097-0010 (Electronic) 0022-5142 (Linking)
Abstract:		"BACKGROUND: The aim of this study was to compare the performance of the following techniques on the isolation of volatiles of importance for the aroma/flavor of fresh cashew apple juice: dynamic headspace analysis using PorapakQ((R)) as trap, solvent extraction with and without further concentration of the isolate, and solid-phase microextraction (fiber DVB/CAR/PDMS). RESULTS: A total of 181 compounds were identified, from which 44 were esters, 20 terpenes, 19 alcohols, 17 hydrocarbons, 15 ketones, 14 aldehydes, among others. Sensory evaluation of the gas chromatography effluents revealed esters (n = 24) and terpenes (n = 10) as the most important aroma compounds. CONCLUSION: The four techniques were efficient in isolating esters, a chemical class of high impact in the cashew aroma/flavor. However, the dynamic headspace methodology produced an isolate in which the analytes were in greater concentration, which facilitates their identification (gas chromatography-mass spectrometry) and sensory evaluation in the chromatographic effluents. Solvent extraction (dichloromethane) without further concentration of the isolate was the most efficient methodology for the isolation of terpenes. Because these two techniques also isolated in greater concentration the volatiles from other chemical classes important to the cashew aroma, such as aldehydes and alcohols, they were considered the most advantageous for the study of cashew aroma/flavor"
Keywords:		"Anacardium/*chemistry Beverages Chemical Fractionation/*methods Esters/isolation & purification Fruit/*chemistry Gas Chromatography-Mass Spectrometry Humans Liquid-Liquid Extraction Odorants/*analysis Oils, Volatile/analysis/*isolation & purification Plan;"
Notes:		"MedlineSampaio, Karina L Biasoto, Aline C T Da Silva, Maria Aparecida A P eng Comparative Study Research Support, Non-U.S. Gov't England 2014/05/03 J Sci Food Agric. 2015 Jan; 95(2):299-312. doi: 10.1002/jsfa.6718. Epub 2014 May 30"