In this study,spinach(Spinacia oleracea L.)was pretreated with sodium hypochlorite solution,ultrasonic and ozone soaked in distilled water,respectively.Then the effects of these three treatments on sterilization condition and quality of fresh spinach were investigated.Results suggested that the optimal conditions for sodium hypochlorite were at a concentration of 75 mg·L-1,pH of 5.5 and soaking time of 15 min;while those of ultrasonic treatment were:a power of 200 W,water temperature of 40 ℃,and treatment f...