Analysis by solid phase microextraction of coffe extracts obtained by supercritical carbon dioxide extraction

Abstract

Colombian coffee extracts (Coffea arabica) obtained with supercritical carbon dioxide and collected on propyleneglycol were analyzed by solid phase microextraction. The analytical parameters were optimized by surface response design. Temperature and extraction time were evaluated as factors, whereas the total chromatographic area and the number of chromatographic peaks were the response variables. The temperature and extraction time were significant, while the interaction between both factors were not significant for the models. Extraction at 60ºC for 25 was selected as the optimal parameters for the HS-SPME analysis using a PDMS/DVB fiber.