... sulphuric acid 硫酸 sulphuric acid bath 硫酸浴 sulphurization 硫化作用 ...
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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。
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