Simultaneous determination of four components in Gastrodia elata by RP-HPLC / 中国中药杂志

<p><b>OBJECTIVE</b>To develop a reversed-phase HPLC method for simultaneous determination of gastrodin, adenosin, 4-hydroxybenzyl alcohol and 4-hydroxybenzaldehyde in Rhizoma Gastrodia.</p><p><b>METHOD</b>A Kromasil C18 column (4.6 mm x 250 mm, 5 microm) was used with a methanol-water-0.1% acetic acid gradient elution system. The eluates were detected at 270 nm, the flow rate was 1.0 mL x min(-1) and the column temperature was 35 degrees C.</p><p><b>RESULT</b>The linear range of gastrodin, adenosin, 4-hydroxybenzyl alcohol and 4-hydroxybenzaldehyde were 19.1-383 (r = 0.999 9), 0.620-12.4 (r = 0.999 9), 2.45-49.0 (r = 0.999 9), 0.280-5.63 mg x L(-1) (r = 0.999 6), respectively. The average recoveries (n = 9) of the four components were 96.7% -97.7%, RSD < 1.6%.</p><p><b>CONCLUSION</b>The method is accurate, sensitive and reliable for determination of gastrodin, adenosin, 4-hydroxybenzyl alcohol and 4-hydroxybenzaldehyde in Rhizoma Gastrodia.</p>

Fingerprint analysis of Flos Genkwa by HPLC / 中草药

Objective To establish the chromatographic fingerprint analysis for the quality control of Flos Genkwa.Methods RP-HPLC Method was applied to establish the chromatographic fingerprint.The separation was performed on a Kromasil C18 column(250 mm?4.6 mm,5 ?m)with a gradient elution composed of methanol and 0.05% phosphate acid.The column temperature was set at 35 ℃ and the flow rate was 1.0 mL/min.The detective wavelength was at 238 nm.Results Twenty-one characteristic peaks were established in the fingerprint.The mutual model of Flos Genkwa was established and the similarities were calculated.The similarity of 17 samples in all the 19 samples was more than 0.90.Conclusion The method is simple and accurate with good reproducibility.It can be used for the quality control of Flos Genkwa.