Simultaneous determination of eight major bioactive compounds in Dachengqi Tang (DT) by high-performance liquid chromatography

Wenfu Tang , Meihua Wan , Zhengyan Zhu , Guanyuan Chen and Xi Huang

Chinese Medicine 2008, 3:5doi:10.1186/1749-8546-3-5


Published:	29 April 2008

Abstract (provisional)

Background

Dachengqi Tang (DT) is a common traditional Chinese medicine formula for expelling neire ('internal heat') in the stomach and intestines. There was no reliable analytical method available for the quality control of DT.

Methods

A high-performance liquid chromatography (HPLC) method with a reverse phase C18 column (150 x 4.6mm) was developed. The mobile phase was methanol with 0.2% acetic acid. Eight markers including naringin, hesperidin, aloe emodin, rhein, honokiol, magnolol, emodin and chrysophanol were determined.

Results

Regression analysis revealed a linear relationship between the concentrations of the markers and the peak area ratio of the standards and internal standard. The limit of detection (S/N=3) and the limit of qualification (RSD<20%) ranged from 0.21 to 0.43 ng/ul and 0.76 to 1.74 ng/ul respectively. The recovery was between 95.6% and 103.4%. The tests on the samples from three batches of DT showed that the profiles of the markers did not vary significantly among batches.

Conclusion

A reliable HPLC method for simultaneous determination of the eight markers in DT was developed.