›› 2017, Vol. 29 ›› Issue (5): 824-830.DOI: 10.3969/j.issn.1004-1524.2017.05.20

• Food Science • Previous Articles     Next Articles

Comparison and analysis of nucleoside, cordycepic acid and amino acid content in insect body and stroma of Cordyceps gryllotalpae

YE Riying1, WANG Yaling1, *, HOU Hongwei1, ZHANG Chunhui2, SUN Lijun1, XU Defeng1   

  1. 1. College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China. ;
    2. Maindata Inspection and Certification Technology Co. Ltd., Qinzhou 535000, China
  • Received:2016-12-15 Online:2017-05-20 Published:2017-06-06

Abstract: In order to detect nucleoside, cordycepic acid and amino acid contents in insect body and stroma of Cordyceps gryllotalpae, ultrasound technology was used in extracting water-soluble constituents of C. gryllotalpae, and HPLC detection system was established and used in detecting nucleoside, cordycepic acid and amino acid were detected respectively by spectrophotometer and automatic amino acid analyzer. The result showed that recovery of nucleoside detection was 95.73%-99.00%, the accuracy of appearance time was 0.05%-0.14%, the accuracy of peak area was 0.12%-0.84%, contents of uridine, inosine, vernine and adenosine of insect body and stroma were respectively 2.86, 0.43, 2.12, 0.17 and 3.53, 0.89, 3.51, 1.39 mg·g-1. Recovery of cordycepic acid detection was 98.29%, cordycepic acid content in insect body and stroma were 109.64 and 127.46 mg·g-1, and amino acid score of them were 56.3 and 62.8,essential amino acid index of them were 81.9 and 115.4. The result indicated that contents of nucleoside, cordycepic acid and nutritive value of protein in stroma were all more tnan those in insect body.

Key words: Cordyceps gryllotalpae, nucleoside, cordycepic acid, amino acid

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