摘要：Apple juices prepared by conventional procedures were examined for phenolic composition before and after each processing step. The loss of phenolic compounds during pressing, filtration (kieselguhr, kieselguhr and perlit) and concentration processes was found 10.4 %, 4.4 %, 8.6 % and 29.6 %, respectively. Ten months storage of concentrate was resulted in the highest loss of phenolic compounds to be at level 33%.
