Microwave, water bath and ultrasonic extraction were employed to extract the polysaccharide from Pyrus Betulaefolia Bge. leaf and anthrone-sulphuric acid colorimetry was used to determine its content.

• 分别采用微波、水浴及超声波3种方法提取杜梨叶片多糖,用蒽酮-硫酸比色法测定多糖的含量。