|Development of a new method of headspace analysis on flavored mineral waters
|Dr Emilie Descours
Abstract Information :
Currently the flavored mineral water market is booming, it is one of the most dynamic segments in the bottled water market. Faced with this growing market, a number of problems related to the analysis of water (to realise a match of a product or to find the origin of an off-flavour) arise. Thus, it is necessary to have the most sensitive and repeatable method of analysis. The volatile molecules contained in the head space are representatives of the smell and taste. Solid-Phase Micro-Extraction (SPME) method is currently used to preconcentrate volatils compounds before analyse by GC-MS. This method is simple to implement but a lot of problems of sensitivity and repeatability are observed. This is why a new technique, a dynamic head space method called In Tube Extraction (ITEX), has been developed to overcome these problems. The aim is to develop an ITEX method and to compare it with the SPME on an aqueous model medium (mineral water with the most common flavors in the flavored waters of the market). A better extraction of volatile molecules with better repeatability is obtained for a number of volatils compounds with the ITEX technique.