Optimization Technology of Extracting Anthocyanins From the Purple Leaf Brassica napus by Orthogonal Experiment

Taking purple leaf Brassica napus as the research materials,the ortho-design experiment was carried out to study the influence of extraction time,extraction temperature,extraction agent and solid-liquid ratio on purple leaf Brassica napus anthocyanins extraction yield,and to establish the best extraction process.The results showed that factors which affected the anthocyanins extraction yield of purple leaf Brassica napus were extraction timesolid-liquid ratioextracting temperatureextracting agent type,and the optimum technology parameters were follows,the extracting temperature was 60℃;extracting agent was 3% hydrochloric acid+90%ethanol;solid-liquid ratio was 1∶15g/mL and the extracting time was 5h.