HIGH HYDROSTATIC PRESSURE EXTRACTION OF SALIDROSIDE FROM RHODIOLA SACHALINENSIS

Abstract

ABSTRACT A nonthermal process, high hydrostatic pressure (HHP), was used as a new extraction technique to obtain salidroside from Rhodiola sachalinensis. The leaching rates of salidroside were measured under different treatment conditions. When the material was treated under 500 MPa of hydrostatic pressure with 50 times of volume 60% (v/v) of ethanol solution as the extracting solvent, the leaching rate of salidroside was up to 0.401% in 3 min, while that of ultrasonic extraction was at 0.288% in 30 min and that of reflux extraction was at 0.302% in 120 min. The HHP extraction technique showed high efficiency in extracting salidroside at room temperature using moderate ethanol concentration.PRACTICAL APPLICATIONS Rhodiola is prevalently used as a safe and effective antifatigue drug and as an adaptogen around the world. But the common extraction methods used to yield commercial products are still traditional ones, which could easily lead some thermosensitive ingredients to lose their biologic activities. The nonthermal extraction method is the key point of the realization of herb modernization. The high hydrostatic pressure (HHP) technique can be operated at room temperature and can shorten processing time. The extract produced by the method has proved to be of higher extraction yield than traditional varieties. In addition, the HHP technique only consumes electric energy without exhaust emission, which is an environment‐friendly method. In the future, we will cooperate with those far‐seeing companies to achieve its industrialization. The annual sale of herbs in the whole world has reached 30 billion. We do not doubt the prospect of this technique.