GC-MS and SPME Techniques Highlighted Contrasting Chemical Behaviour in the Water Extractives of Modified Castanea sativa Mill. and Fagus sylvatica L. Wood

The sweet chestnut (Castanea sativa Mill.) and European beech (Fagus sylvatica L.) are wood species largely present in the forest area. composition relative variation of secondary metabolites under thermal effect is a little-explored material was thermally modified at 170 °C for 3 h using thermo-vacuum technology. Raw extracts were obtained with aqueous extraction techniques an autoclave, subsequently lyophilized, solubilized ethyl acetate, determined by Gas Chromatographic-Mass Spectrometric Analyses (GC-MS). In addition, volatile compounds Solid-Phase Micro Extraction (SPME) analyses. As general statement, autoclave produced higher number compared to unmodified material. Beech showed low degradation after modification. Notably, squalene ar-tumerone main bioactive extractives. Chestnut, conversely, greater thermo-modification. However, reduction chemical samples also observed. this case, biologically active detected only control apocynin ar-tumerone. recovery residual material, before energy consumption, could provide sustainable environmentally friendly means obtaining natural chemicals suitable various industrial applications.