Effects of xanthan and sugar on the release of aroma compounds in model solution

The effects of the interaction of xanthan and sugar on the release of aroma compounds (alpha-pinene, ethyl acetate, ethyl butyrate, perillaldehyde, hexenal, and d-limonene) were investigated in model solutions (xanthan, sugar and xanthan-sugar solutions). The released aroma compounds were analysed by solid-phase microextraction and gas chromatography-mass spectrometer (SPME/GC-MS). The results showed that the six aroma compounds decreased differently in the 0.4g center dot L-1 xanthan solution. A slightly stronger release of these aroma compounds in glucose solution was observed than that in sucrose solution. The release of these aroma compounds increased in the xanthan solution after the addition of the sucrose. This indicated that the release of these aroma compounds was inhibited in the xanthan solution. But the addition of sucrose in the xanthan solution could promote the release of the aroma compounds. Additionally, the rheology results showed that the xanthan solution exhibited a gradual shear thinning and the C* of xanthan was 2g center dot L-1. However, the concentrations of the xanthan solution which could inhibit the release of the six aroma compounds were not fully consistent with C*. And this indicated that viscosity was not the main factor influencing the release of aroma compounds in the xanthan solution. Copyright (C) 2016 John Wiley & Sons, Ltd.