ENGLISH ABSTRACT
JOURNAL ARTICLE
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[Simultaneous determination of cordycepin and 2'-deoxyadenosine in Cordyceps genus by online SPE-HPLC].

An online SPE-HPLC method for simultaneous determination of cordycepin (3'-deoxyadenosine) and 2'-deoxyadenosine in Cordyceps genus (C. sinensis,C. militaris,Hirsutella sinensis and C. sobolifera) was developed. The samples were enriched on a ZORBAX SB-AQ (4.6 mm×12.5 mm,5 μm) column with isocratic elution by 9% methanol solution. The separation of analytes was performed on a ZORBAX SB-AQ (4.6 mm×150 mm,5 μm) column with gradient elution by 0.1% formic acid solution and methanol (91∶9). The flow rate was 1.0 mL•min⁻¹. Column temperature was 40 ℃ and detection wavelength was 260 nm. This method has been applied for analysis of different Cordyceps genus. The 2'-deoxyadenosine was detected in C. sinensis,Hirsutella sinensis and C. sobolifera. The cordycepin was detected in C. militaris. In summary,the cordycepin chromatographic peak from C. sinensis in some past reports may be the 2'-deoxyadenosine chromatographic peak or the mixture peak of 2'-deoxyadenosine and cordycepin in which 2'-deoxyadenosine content was higher than cordycepin. The developed method is suitable for analysis of cordycepin and 2'-deoxyadenosine in Cordyceps genus.

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