Abstract:Headspace solid-phase microextraction (HS—SPME) was applied to the analysis of volatile components in apple juice. There are differences among parameters for the extraction of esters, alcohols and aldehydes. Therefore a model of fuzzy comprehensive evaluation was established and used to optimize the parameters of microextraction. The result of fuzzy comprehensive evaluation was set as the response. The extraction conditions were optimized by using a response surface experimental design to analyze the effect of three factors: extraction temperature, extraction time and NaCl concentration. Optimal extraction conditions for esters, alcohols and aldehydes were obtained when the extraction temperature was 51.3℃, extraction time was 45.2min and NaCl concentration was 0.252g/mL. For the proposed method, the linearity was good in the considered concentration ranges (R2≥0.983). Recoveries ranged from 87.6% to 106.3% and showed good accuracy. The relative standard deviation was less than 10.09%.