Role of extraction procedures on the concentration of varietal thiol precursors in Grillo white grape must

Background and Aims Varietal thiol precursors (VTPs) decrease strongly after the pre-fermentative operations. The effect of grape must extraction steps on the concentration of S-3-(hexan-1-ol)-L-glutathione (G-3SH), S-3-(hexan-1-ol)-L-cysteine (Cys-3SH) and S-3-(hexanal)-glutathione (G-3SHal) was investigated. Methods and Results Must produced on a commercial scale was sampled throughout the pre-fermentation steps. Must was also prepared in the...