High-performance liquid chromatographic method for simultaneous determination of sophoridine and matrine in rat plasma.
A high-performance liquid chromatographic (HPLC) method is described for the simultaneous determination of sophoridine and matrine in rat plasma. Sophoridine and matrine in the resulting supernatant of the plasma deproteinized with acetonitrile containing an internal standard (acetanilide) were directly determined by reversed-phase HPLC and ultraviolet detection. The result of limits of quantitation for matrine and sophoridine were 200 and 350 ng/mL in plasma, respectively, and recovery of both analytes was greater than 98%. The assay was linear from 250 to 4000 ng/mL for matrine and from 500 to 8000 ng/mL for sophoridine. Variation over the range of the standard curve was less than 15%. The method was used to determine the concentration-time profiles of matrine and sophoridine in the plasma following oral administration of Kexieling tablets, which is one of the preparations of Kudouzi at a dose equivalent to 30 and 60 mg/kg of matrine and sophoridine, respectively.
Li
Yumin
Y
Department of General Surgery, of the First Hospital of Lanzhou Medical College, Lanzhou 730000, People's Republic of China. lym@public.lz.gs.cn
Min
Guangtao
G
Xue
Qunji
Q
Chen
Liren
L
Liu
Weimin
W
Chen
Hao
H
D000470:Alkaloids / Q000097:blood*; D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008297:Male; D011807:Quinolizines; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet; D000093842:Matrines
D000470:Alkaloids; D011807:Quinolizines; D000093842:Matrines