目的:建立人血浆中维生素 E 烟酸酯的 HPLC 测定方法,进行维生素 E 烟酸酯的人体药代动力学研究。方法:20名健康志愿者口服维生素 E 烟酸酯颗粒剂400 mg,取血浆经预处理后采用 HPLC 法测定维生素 E 烟酸酯经时血浓度,固定相为Phenomenex...目的:建立人血浆中维生素 E 烟酸酯的 HPLC 测定方法,进行维生素 E 烟酸酯的人体药代动力学研究。方法:20名健康志愿者口服维生素 E 烟酸酯颗粒剂400 mg,取血浆经预处理后采用 HPLC 法测定维生素 E 烟酸酯经时血浓度,固定相为Phenomenex Luna C_(18)色谱柱(150 mm×4.6 mm,5 μm),流动相为甲醇-乙腈(85:15),流速1.0 mL·min^(-1),检测波长264 nm,DAS 2.0软件计算相应药代动力学参数。结果:维生素 E 烟酸酯在0.025~1μg·mL^(-1)范围内线性关系良好,日内、日间精密度均小于10%。健康志愿者维生素 E 烟酸酯主要药代动力学参数为:t_(1/2)=(6.52±2.16)h,T_(max)=(4.40±0.31)h,C_(max)=(0.46±0.08)μg·mL^(-1),AUC_(0-24)=(2.50±0.39)μg·mL^(-1)·h,AUC_(0-∞)=(2.74±0.42)μg·mL^(-1)·h,MRT_(0~24)=(8.35±0.44)h,CL/F=(2.31±0.43)L·h^(-1)·kg^(-1),V/F=(21.46±7.12)L·kg^(-1)。结论:本方法简单,灵敏度、专属性好。维生素E烟酸酯人体药代动力学过程符合二室模型,表观分布容积大,体内平均滞留时间长。展开更多
Aim To establish a LC-MS method for determining the concentration of nifedipine in human plasma and to evaluate the pharmacokinetic characteristics of nifedipine sustained-release tablets. Methods A XB-C18 (5 μm, 4....Aim To establish a LC-MS method for determining the concentration of nifedipine in human plasma and to evaluate the pharmacokinetic characteristics of nifedipine sustained-release tablets. Methods A XB-C18 (5 μm, 4.6 mm ×150 mm) column and a mobile phase of methanol: 0.01 mol·L^-1ammonium acetate (60:40, V/V) were used to separate nifedipine, the detections was accuracy under atmosperic pressure electronic spray ionization (AP-ESI) mode and ion mass spectrum (m/z) of 314.9 [M+H]^+ for nifedipine, and 320.8 [M+H]^+ for lorazepam (Internal Standard, IS). Results The linear range of nifedipine was 0.3 - 80 ng·mL^-1 ( r = 0.9997), and the limit of quantitation (LOQ) was 0.3 ng·mL^-1. The nifedipine pharmacokinetic parameters after a single dose of 20 mg nifedipine sustained-release tablets test (T) or reference (R) were as the followings, t1/2 (6.73 ± 2.00) h and (7.04 ± 2.18) h, Tmax (4.28 ± 0.70) h and (4.48 ± 0.70) h, Cmax(39.66 ± 10.58) ng·mL^-1 and (40.19 ± 10.97) ng·mL^-1, AUC0-36 (391.63 ± 108.55) ng·mL^-1·h and (387.57 ± 121.51) ng·mL^-1·h, and AUC0-∞ (408.28 ± 121.16) ng·mL^-1·h and (406.15 ± 133.13) ng·mL^-1·h. The relative bioavailability of nifedipine sustained-release tablets (test) was (103.02 ± 13.93) %. Conclusion LC-MS method for the determination of concentrations of nifedipine in human plasma was sensitive and accurate, and could be used in nifedipine bioavailability and pharmacokinetic studies.展开更多
文摘目的:建立人血浆中维生素 E 烟酸酯的 HPLC 测定方法,进行维生素 E 烟酸酯的人体药代动力学研究。方法:20名健康志愿者口服维生素 E 烟酸酯颗粒剂400 mg,取血浆经预处理后采用 HPLC 法测定维生素 E 烟酸酯经时血浓度,固定相为Phenomenex Luna C_(18)色谱柱(150 mm×4.6 mm,5 μm),流动相为甲醇-乙腈(85:15),流速1.0 mL·min^(-1),检测波长264 nm,DAS 2.0软件计算相应药代动力学参数。结果:维生素 E 烟酸酯在0.025~1μg·mL^(-1)范围内线性关系良好,日内、日间精密度均小于10%。健康志愿者维生素 E 烟酸酯主要药代动力学参数为:t_(1/2)=(6.52±2.16)h,T_(max)=(4.40±0.31)h,C_(max)=(0.46±0.08)μg·mL^(-1),AUC_(0-24)=(2.50±0.39)μg·mL^(-1)·h,AUC_(0-∞)=(2.74±0.42)μg·mL^(-1)·h,MRT_(0~24)=(8.35±0.44)h,CL/F=(2.31±0.43)L·h^(-1)·kg^(-1),V/F=(21.46±7.12)L·kg^(-1)。结论:本方法简单,灵敏度、专属性好。维生素E烟酸酯人体药代动力学过程符合二室模型,表观分布容积大,体内平均滞留时间长。
文摘Aim To establish a LC-MS method for determining the concentration of nifedipine in human plasma and to evaluate the pharmacokinetic characteristics of nifedipine sustained-release tablets. Methods A XB-C18 (5 μm, 4.6 mm ×150 mm) column and a mobile phase of methanol: 0.01 mol·L^-1ammonium acetate (60:40, V/V) were used to separate nifedipine, the detections was accuracy under atmosperic pressure electronic spray ionization (AP-ESI) mode and ion mass spectrum (m/z) of 314.9 [M+H]^+ for nifedipine, and 320.8 [M+H]^+ for lorazepam (Internal Standard, IS). Results The linear range of nifedipine was 0.3 - 80 ng·mL^-1 ( r = 0.9997), and the limit of quantitation (LOQ) was 0.3 ng·mL^-1. The nifedipine pharmacokinetic parameters after a single dose of 20 mg nifedipine sustained-release tablets test (T) or reference (R) were as the followings, t1/2 (6.73 ± 2.00) h and (7.04 ± 2.18) h, Tmax (4.28 ± 0.70) h and (4.48 ± 0.70) h, Cmax(39.66 ± 10.58) ng·mL^-1 and (40.19 ± 10.97) ng·mL^-1, AUC0-36 (391.63 ± 108.55) ng·mL^-1·h and (387.57 ± 121.51) ng·mL^-1·h, and AUC0-∞ (408.28 ± 121.16) ng·mL^-1·h and (406.15 ± 133.13) ng·mL^-1·h. The relative bioavailability of nifedipine sustained-release tablets (test) was (103.02 ± 13.93) %. Conclusion LC-MS method for the determination of concentrations of nifedipine in human plasma was sensitive and accurate, and could be used in nifedipine bioavailability and pharmacokinetic studies.