Optimization for Ultrasonic-Assisted on Extraction of Monascus Red Pigment and Yellow Pigments

Extraction of Monascus pigments in mycelia by ultrasonic-assisted technology,on the basis of single factor experiments,using response surface method optimizes the extraction of red pigment process parameters. A quadratic regression model was established,and the optimum extraction conditions were obtained. The results showed that ethanol concentration,solid-liquid ratio,ultrasonic wave power of these three factors on the extraction of red pigment had a significant influence,ethanol concentration 76.30%,solid-liquid ratio 34.44 ∶1,ultrasonic wave power 304.84 W. Under the optimum conditions,the red pigment concentration of the extract reached the maximum 5 679.4 U/g,the yellow pigment was as high as 4 633 U/g. With the national standard compared to red pigment extraction,the extraction rate increased by 6.5% and 8.9%.