Study on the characters of PPO and anti-browning inhibitors in mushrooms

Spectrophotometer method was applied in this experiment to study characters of polyphenlase (PPO) in mushrooms.At the same time, this article also analyzed the effect of ascorbic acid, Sodium sulfite and citric acid on PPO.The result showed that the absorptive wave length of product was 418 nm, the optimum temperature was 55 ℃, the proper pH was 6.6.In this circumstance sodium sulfite could significantly inhibit the activities of PPO and resistant the browing of mushroom, ascorbic acid were also effective,compared with ascorbic acid,sodium sulfite,but the citric acid was less effective only in high concentration.