【摘 要】
：
It was studyed on the Chinese herbal medicines analysis in order to search for a new extraction technology.The conventional herbal quality testing and analysis is used to be implemented by water decoc
【机 构】
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Beijing Rayleigh Analytical Instrument Corp.Beijing, 100016, China
【出 处】
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DaLian Internationall Symposia and Exhibition on Chromatogra
论文部分内容阅读
It was studyed on the Chinese herbal medicines analysis in order to search for a new extraction technology.The conventional herbal quality testing and analysis is used to be implemented by water decoction, ultrasonic extraction, Soxhlet extraction and steam distillation extraction.At here, the characteristics of extracting the active ingredient hlorogenic acid from the flos lonicerae japonicae were investigated by using a closed-vessel microwave assisted extraction (MAE) apparatus with a precise pressure controlling unit.The MAE method was contrasted with the ultrasonic extraction method which is recommended by the Pharmacopoeia.By the MAE method the major parameters that influence the extraction efficiency were optimized at 35% Ethanol, 1∶30 solid/liquid ratio, 60% microwave power (the full power is 850W), 0.10 MPa pressure in the extraction vessels, 1 min holding time.By the ultrasonic extraction, 35% Ethanol, 1∶40 solid/liquid ratio, 100% ultrasonic power (the full power is 300W), 40 min extraction time were chosen.
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