Distinction between Gastrodia elata and its four falsified specimens and determination of gastrodin by capillary electrophoresis / 中草药

ABSTRACT

To develop a method for the distinction of genuine Gastrodia elata B1. from its four falsified plants of common occurrence and determination of its active principle, gastrodin by capillary electrophoresis. Methods　The electrophoretic conditions were a buffer solution containing 24 mmol/L borate (pH=9.4), at a voltage of 16 kV. Results　The electrophorograms obtained under the above conditions showed easily distinguishable differences. Baseline separation of gastrodin was achieved and its quantitative analysis can be accomplished within 15 min. The linear correlation equation was Y=-0.048+7.79X (r=0.999). Conclusion　This method could serve as an easy and precise method for the quality control of G. elata.