Extraction process of polyphenols from roses

Alcohol steeping-extraction technology was used to extract polyphenols from roses.The single factor experiments and orthogonal test were adopted to study the impacts of different alcohol concentration,material / liquid ratio,extraction temperature,extraction duration and extract times.Experimental results showed that the order of different effect factors on yield was : alcohol concentration extraction temperature materiel / liquid ratio extraction duration;the optimal extraction process is: 75 % alcohol,1: 20material / liquid ratio,70 ℃ extraction temperature,extraction for 40 min,and extract twice.The pure yield of polyphenols under the above extraction condition was 9.18 %.The method is easy to operate,low-cost and highly efficient.It is suitable for the massive industrial production.