Microwave-assisted extraction of polysaccharides from solanum nigrum

  • Chen Xiao-qing Email author
  • Liu qin 
  • Jiang xin-yu 
  • Zeng fan 


The microwave-assisted method was used to extract polysaccharides from solanum nigrum. The optimum experimental parameters, mechanism of the extraction and the effect of microwave-assisted extraction process on the structures of polysaccharides were investigated. The extract was analyzed by the modified phenol-sulfuric acid method at 490 nm. The optimum experimental parameters were obtained by orthogonal experiments as follows: extraction time 15 min, microwave radiation power 455 W and the process ratio of materials mass to solvent volume 1:20. The results show that compared with the conventional reflux extraction, the microwave-assisted extraction has a higher yield in shorter time, with no effect on the finally obtained polysaccharides as seen from the FT-IR spectra. The scanning electron microscopy images reveal that the mechanism of the extraction is related to the structural changes of the plant cells in different extracting conditions.

Key words

solanum nigrum polysaccharides structure microwave-assisted extraction 

CLC number



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Copyright information

© Central South University 2005

Authors and Affiliations

  • Chen Xiao-qing 
    • 1
    Email author
  • Liu qin 
    • 1
  • Jiang xin-yu 
    • 1
  • Zeng fan 
    • 1
  1. 1.School of Chemistry and Chemical EngineeringCentral South UniversityChangshaChina

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