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Food Chem

Title:		Development of a solid phase microextraction protocol for the GC-MS determination of volatile off-flavour compounds from citral degradation in oil-in-water emulsions
Author(s):		Tian H; Yang X; Ho CT; Huang Q; Song S;
Address:		"Department of Food Science and Technology, Shanghai Institute of Technology, 120 Caobao Road, 200235 Shanghai, China"
Journal Title:		Food Chem
Year:		2013
Volume:		20130314
Issue:		1
Page Number:		131 - 138
DOI:		10.1016/j.foodchem.2013.02.112
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"The conditions for headspace solid phase microextraction (HS-SPME) analysis of volatile off-flavour compounds in citral emulsion were determined. Type of SPME phase (65 mum PDMS/DVB, 100 mum PDMS and 75mum CAR/PDMS), adsorption temperature and salt concentration were significant factors affecting total peak area in the gas chromatogram and optimised in one factor experiments. Then, adsorption temperature (30-50 degrees C), adsorption time (20-40 min), and salt concentration (0-6M) were studied to develop HS-SPME condition for obtaining the highest extraction efficiency. PDMS/DVB in 65 mum was the optimum fiber because of high adsorption efficiency and good reproducibility. The optimal condition was adsorption at 50 degrees C for 40 min and 6M salt added to sample. Good Linearity, high recovery, good reproducibility and low limit of detection (LOD) for all off-odour compounds according to the optimised SPME conditions indicated that the SPME procedure was applicable for the analysis of the degraded citral products in headspace volatile of emulsion"
Keywords:		Acyclic Monoterpenes Emulsions/chemistry Flavoring Agents/analysis/*isolation & purification Gas Chromatography-Mass Spectrometry Monoterpenes/analysis/*isolation & purification Solid Phase Microextraction/*methods Volatile Organic Compounds/analysis/*iso;
Notes:		"MedlineTian, Huaixiang Yang, Xiaoqing Ho, Chi-Tang Huang, Qingrong Song, Shiqing eng Evaluation Study Research Support, U.S. Gov't, Non-P.H.S. England 2013/06/19 Food Chem. 2013 Nov 1; 141(1):131-8. doi: 10.1016/j.foodchem.2013.02.112. Epub 2013 Mar 14"