MICROWAVE-ASSISTED EXTRACTION OF MONOTERPENOLS IN MUST SAMPLES

The microwave-assisted extraction of five terpenic compounds associate d with the varietal aroma of Vitis vinifera was developed and optimize d by means of three- and two-level factorial designs, Four variables ( extractant solvent volume, extraction temperature, amount of sample an d extraction time) were considered as factors in the optimization proc ess, The results suggest that the solvent volume and the amount of sam ple to be extracted are statistically significant for the overall reco very of the studied species, although compromise conditions have to be established in order to avoid losses of the extracted compounds in th e concentration steps needed when the solvent volume increases, The op timum conditions established were applied to the extraction of real gr ape must samples and compared with the results given by conventional a lternative procedures.