Optimization of headspace sampling using solid-phase microextraction (SPME) for volatile components in starfruit juice

• Main Authors: Abdullah, Abdul Ghani Liew, Sulaiman, Nasri, Aruora, M. K.
• Format: Conference or Workshop Item
• Language: English
• Published: Federation of Engineering Institutions of Islamic Countries 2006
• Online Access: http://psasir.upm.edu.my/id/eprint/39613/1/39613.pdf; http://psasir.upm.edu.my/id/eprint/39613/

Volatiles are important flavor compounds of fruit juices and beverages. In this study, a headspace Solid-phase microextraction (SPME) gas chromatography-mass spectrometry (GC-MS) was used to analyze volatile components in starfruit juices. Several experimental parameters (e.g. adsorption temperature, adsorption time and sample volume) were optimized to improve sampling efficiency in two aspects; maximum adsorption and selective adsorption of volatile components onto SPME fiber. The following conditions was found to be optimal for selectivity and sensitivity: adsorption temperature of 50oC for 30 min with a 65 μm divinylbenzene /polydimethylsiloxane (DVB/PDMS) coated fiber with and sample volume of 15 g in a 30 ml vial. The proposed technique could be applied for the analysis volatile compounds that contribute to starfruit juices flavor in different cultivars and also their ripening stages.