1.Determination of Quercitrin in Saxifrage by HPLC
Yimin ZHENG ; Yanhong YANG ; Xiuying XU ; Shanquan FU
China Pharmacy 2005;0(18):-
OBJECTIVE:To establish a HPLC method for the determination of quercitrin in Saxifrage.METHODS:The analysis was performed on C18 column(150mm?4.6mm,5?m),the mobile phase was MeOH-0.2%H3PO4 (45∶55)with a flow rate at 1.0ml/min and wavelength at 350nm under room temperature.RESULTS:There was a good linear relationship when the sample size of quercitrin was at a range of 0.40?g~2.00?g(r=0.9 996),the recovery was 95.33%with RSD at 2.80%.CONCLUSION:This method was simple,stable,fast,and reproducible and without the interference of impurity,which can be used for the content determination of quercitrin in Saxifrage.
2.RP-HPLC Analysis and Pharmacokinetics Study of Serum Carthamin in Mice
Xiuying XU ; Yimin ZHENG ; Shanquan FU ; Yumei HAN ; Ali WANG
China Pharmacy 2007;0(33):-
OBJECTIVE:To establish an RP-HPLC analysis of Carthamin in mice and to study its pharmacokinetics.METHODS:The serum concentration of Carthamin was determined by RP-HPLC.The blood concentration-time curve was established and the main pharmacokinetic parameters were computed.RESULTS:The linear range of Carthamin was 0.558~55.8 ?g?L-1(r=0.999 2),with the lowest limit of detection at 0.005 ?g?L-1Carthamin in vivo assumed two-compartment model and rapid absorption.CONCLUSION:The proposed method is simple,sensitive and reproducible,and it met the standard for pharmacokinetic study.
3.Determination of Demethylbellidifolin in Different Parts of Swertia Davidi Franch. by HPLC
Youli ZHANG ; Yimin ZHENG ; Xiuying XU ; Shanquan FU
China Pharmacy 2005;0(15):-
OBJECTIVE: To establish a HPLC method for the determination of the content of Demethylbellidifolin in different parts of Swertia davidi Franch. METHODS: The analysis was carried out on Hypersil C18 column (150mm?4.6mm,5 ?m) at room temperature with mobile phase consisted of CH3OH-0.5%H3PO4(56∶44) at a flow-rate of 1.0mL?min-1.The detection wavelength was set at 254 nm. RESULTS: The linear range of Demethylbellidifolin was 0.52~2.60?g (r=0.999 4) and the average recovery was 99.77%(RSD=0.95%).CONCLUSION: The method is simple, rapid, reproducible, and suitable for the determination of the content of Demethylbellidifolin in Swertia davidi Franch..
4.Simultaneous determination of three homoisoflavonoids in Ophiopogon japonicus by HPLC.
Pintao ZENG ; Hui ZHOU ; Yimin ZHENG ; Xiuying XU ; Shanquan FU
China Journal of Chinese Materia Medica 2012;37(1):71-74
Three homoisoflavonoids, 6-aldehydo-3-ophiopogonanone A, methyl ophiopogonanone A and ophiopogonanone A from Ophiopogon japonicus were analyzed simultaneously by HPLC with acetonitrile-water containing 0.5% H3 PO4 (58:42) as the mobile phase, and the detection wavelength was set at 296 nm (0-14 min) and 275 nm (14-22 min). The mean recoveries of three homoisoflavonoids were 99.41%-99.86% (RSD 0.82%-1.05%). The linear response ranges of. 6-aldehydo-3-ophiopogonanone A, methyl ophiopogonanone A and ophiopogonanone A were 0.165-0.990 microg (r = 0.999 9), 0.153-0.918 microg (r = 0.999 9), and 0.270-1.620 microg (r = 0.999 9), respectively. This method was certified to be accurate and reliable and can be used for quality control of O. japonicus.
Chromatography, High Pressure Liquid
;
methods
;
Drugs, Chinese Herbal
;
analysis
;
Isoflavones
;
analysis
;
Ophiopogon
;
chemistry
5.Determination of twelve ginsenosides in Panax ginseng by HPLC.
Xiuying XU ; Yimin ZHENG ; Shanquan FU ; Ying ZHAO ; Jie LI ; Linlin WANG
China Journal of Chinese Materia Medica 2011;36(11):1463-1465
OBJECTIVETo determine the contents of twelve ginsenosides in the root of Panax ginseng by HPLC.
METHODThe analysis is carried out at room temperature on a Luna NH2 column (4.6 mm x 150 mm, 5 microm) eluted with acetonitrile and water as the mobile phases in a gradient elution. The flow-rate was 1.0 mL x min(-1), the detection wavelength was 203 nm.
RESULTTwelve ginsenosides (Rh2, Rh1, Rg2, Rg3, Rg1, Rf, Re, Rd, Re, Rb2, Rb3, Rb1) were separated at baseline within 60 min with good linearity (r > or = 0.999 5). The recovery rates were 98.1%, 95.3%, 96.1%, 95.6%, 97.3%, 98.6%, 98.0%, 96.4%, 96.1%, 97.6%, 96.8%, 96.9% (RSD < or = 3.0%).
CONCLUSIONThe method was simple,fast and could control the quality of P. ginseng effectively.
Chromatography, High Pressure Liquid ; methods ; Ginsenosides ; analysis ; Panax ; chemistry ; Plant Extracts ; analysis ; Plant Roots ; chemistry ; Quality Control