【Objective】Polyphenol oxidase(PPO) would affect apricot process production.It not only affected the color of apricot manufacture process such as apricot sauce,but also infected their quality,especially apricot tea and apricot juice.It was of great physiological importance and reality 【Method】The mainly growen Saimuiti apricot was used as material in the experiment.The characteristics of fresh apricot PPO were studied.【Result】PPO's optimum reaction pH and temperature were 6.0 and 25℃ respectively.The optimal...