Objective  To evaluate the quality of Tongshu gel paste based on thin layer chromatography (TLC) identification and high performance liquid chromatography (HPLC) quantitative analysis of multi-index components.

Methods   Qualitative identification of tetrahydropalmatine, paeoniflorin, tetrandrine, linderane, Rhizoma atractylodis and Fructus aurantii in the modified Tongshu gel paste was carried out by TLC. The main active contents of tetrahydropalmatine, paeoniflorin, tetrandrine and linderane in the preparation were determined by HPLC.

Results  The TLC spots of the six herbs in the prescription were clear and negative without interference. The linear ranges of tetrahydropalmatine, paeoniflorin, tetrandrine and linderane were 4.30-272.50 μg/mL (r=0.999  9), 21.10-1  350.00  μg/mL(r=0.999 8), 4.10-262.40 μg/mL (r=0.999 8) and 3.60-232.50 μg/mL (r=0.998  6), respectively. The range of average recovery for each component was 98.96%-99.52%, and all RSDs were less than or equal to 1.54% (n=9).

Conclusion  The multi-index TLC qualitative identification and HPLC quantitative method established by research have high specificity, simple operation and can be used for quality evaluation of the improved formulation of this prescription.

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