Extraction of naringin from Citrus wilsonii Fructus Aurantii and its clearance to nitrite

This study mainly discussed the composite enzyme assisted extraction of naringin from Fructus Aurantii and its clearance to nitrite. With the extraction rate of naringin from Fructus Aurantii as indicator,the optimum condition of composite enzyme assisted extraction of naringin from Fructus Aurantii were determined by the response surface methodology,such as pH for 5.3,ultrasonic time for 32 min,ultrasonic power for 230 W,enzyme dosage for 134 μg/g,under these conditions,the extraction yield of naringin from Fructus Aurantii was 3.75%. The results showed that naringin from Fructus Auranti had a strong elimination effect to nitrite,the clearance rate was positively correlated with the concentration of naringin from Fructus Aurantii increased. When concentration of naringin from Fructus Aurantii was 3 mg/mL,the clearance rate to nitrite was 91.1%.Naringin from Fructus Aurantii showed a powerful reduction effect to nitrite and would be hopeful to be applied in the processing of fermented vegetables and meat products added with sodium nitrite as a color fixative.