Study on Standard Revision of Portulaca grandiflora / 中国药房

ABSTRACT

OBJECTIVE:To improve the quality standard of Portulaca grandiflora. METHODS:TLC was used to identify the P. grandiflora with the reference of letuolin and apigenin. HPLC was performed on the column of Hanbon-C18 with the mobile phase of methanol-acid gradient[water-acetic acid(61∶4)] at the flow rate of 1.0 ml/min,the detection wavelength was 335 nm,the temperature was 35 ℃ and the volume was 10 μl. RESULTS:There was a good linear relationship in the quality concentration of scutellarin and luteolin respectively in th range of 0.299 5-1.872 0 μg(r=0.999 8)and 0.015 1-0.094 4 μg(r=0.999 5);the RSDs of precision,stability and reproducibility tests were ≤2.61%. The average recovery was respectively 100.42%(RSD=0.81%,n=6) and 100.65%(RSD=1.64%,n=6). CONCLUSIONS:The established TLC and HPLC are stable,reliable,simple and can be used for the qualitative and quantitative analysis of P. grandiflora.