高效毛细管电泳法测定大鼠血浆中头孢地尼浓度及其药动学 研究
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篇名: 高效毛细管电泳法测定大鼠血浆中头孢地尼浓度及其药动学 研究
TITLE:
摘要: 目的:测定大鼠血浆中头孢地尼浓度,并进行药动学考察。方法:采用高效毛细管电泳法(HPCE)。使用熔融硅胶毛细管柱(75 μm,总长为30 cm,有效长度为21.5 cm),缓冲液为20 mmol/L柠檬酸,进样电压为10 kV持续10 s,分离电压为-20 kV,检测波长为214 nm。取6只大鼠ig头孢地尼溶液(20 mg/kg),分别于给药前及给药后0.25、0.5、1、1.5、2、3、4、6、12、24 h经尾缘静脉取血0.2 mL进行测定。采用BAPP 2.0软件计算药动学参数。结果:头孢地尼质量浓度在0.2~50 μg/mL范围内线性关系良好(r=0.999 7),定量下限为0.2 μg/mL;日内(n=6)、日间(n=3)精密度试验的RSD均不大于12.2%;稳定性试验的RSD≤9.10%(n=6);方法回收率为95.4%~114.3%(RSD=9.0%,n=6);基质效应为63.5%~70.2%(RSD=10.39%,n=6)。头孢地尼在大鼠体内的t1/2为(0.54±0.01) h,MRT为(1.90±0.14) h,cmax为(32.92±0.81) μg/mL,tmax为(1.50±0.02) h,AUC0-24 h为(46.65±0.44)  μg·h/mL,AUC0-∞为(46.83±0.44) μg·h/mL。结论:该方法快速、准确、简便,可用于大鼠血浆中头孢地尼浓度的测定及其药动学考察。
ABSTRACT: OBJECTIVE: To determine the concentration of cefdinir in rat plasma, and investigate its pharmacokinetics. METHODS: High performance capillary electrophoresis (HPCE) was adopted by using fused-silica capillary (75 μm, total length of 30 cm, effective length of 21.5 cm), buffer solution of 20 mmol/L citric acid, injection voltage of 10 kV for 10 s, separation voltage of -20 kV, and detection wavelength of 214 nm. 6 rats were intragastrically received cefdinir solution (20 mg/kg). 0.2 mL blood sample was taken from the tail vein before and 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 12, 24 h after administration. BAPP 2.0 software was used to calculate the pharmacokinetics parameters. RESULTS: The linear range of cedinir ranged 0.2-50 μg/mL (r=0.999 7), lower limit of quantification was 0.2 μg/mL. The intra-day (n=6) and inter-day RSDs of (n=3) precision test were no more than 12.2%; RSD of stability test was no more than 9.10% (n=6); method recovery rate was 95.4%-114.3% (RSD=9.0%, n=6); matrix effect was 63.5%-70.2% (RSD=10.39%, n=6). The t1/2 of cefdinir in rats in vivo was (0.54±0.01) h, MRT was (1.90±0.14) h, cmax was (32.92±0.81) μg/mL, tmax was (1.50±0.02) h, AUC0-24 h was (46.65±0.44) μg·h/mL and AUC0-∞ was (46.83±0.44) μg·h/mL. CONCLUSIONS: The method is rapid, accurate and simple, and can be used for the determination of cefdinir concentration in rat plasma and its pharmacokinetics research.
期刊: 2017年第28卷第19期
作者: 刘晓凤,谭梅英,詹利
AUTHORS: LIU Xiaofeng,TAN Meiying,ZHAN Lizhi
关键字: 头孢地尼;高效毛细管电泳法;大鼠;药动学
KEYWORDS: Cefdinir; High performance capillary electrophoresis; Rats; Pharmacokinetics
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