Objective: To establish an HPLC method of a characteristical chemical fingerprint analysis in combination with simultaneous determination of four bioactive components for species differentiation and quality assessment of Ziziphus jujuba var. spinosa.
Methods: The chromatographic separation was performed on an Agilent TC-C18 BDS (250 mm x 4.6 mm, 5 microm) column. The mobile phase consisted of acetonitrile and water in a linear gradient elution procedure. The evaporator tube temperature of ELSD was set at 110.5 degrees C with the nebulizing gas flow rate of 3.1 mL/min and the flow rate of mobile phase was 1.0 mL/min. The column was maintained at 30 degrees C. The injection volume was 20 microL.
Results: HPLC methodology for both chemical fingerprint analysis and quantitative determination of four active ingredients were validated, respectively. According to the contents of the four ingredients and the chemical fingerprints of Ziziphus jujuba var. spinosa using principal component analysis, Ziziphus jujuba var. spinosa was different from the fake derived from the seeds of Ziziphus mauritiana.
Conclusion: The developed HPLC method is exclusive and repetitive for the species identification and quality evaluation of Ziziphus jujuba var. spinosa.
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