2006•Trace Elements ScienceRequires access
Study on Microwave Extraction of the Yellow Pigment from Lonicera japonica Thunb
Huang Ning-hong
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Abstract
A new method of microwave extraction was used to extract the yellow pigment from the Lonicera japonica Thunb.The extraction processes were investigated and the optimal conditions were determined as follows:the extraction agent is ethanol absolute,the ratio of raw material(g)to extraction agent(mL) is 1∶60,microwave power is 560 W,extraction time is 50 s,extraction times is 3.Under the optimal conditions,extraction rate is 83.40%, pH value of the extractive is 6.Compared with solvent extraction,microwave extraction time from 1 h was reduced to 50 s and extraction rate increased was from 52.21% to 83.4%.The results indicate that the microwave extraction of the pigment is superior to the general solvent extraction.