LC-MS法测定人血浆中噻托溴铵的浓度及其吸入剂药动学研究  

Determination of Tiotropium in Human Plasma by LC-MS and Study of Pharmacokinetics of Its Inhalation Powder

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作  者:谭文明[1] 丁黎[2] 沈建平 

机构地区:[1]江门市中心医院药学部,广东江门529030 [2]中国药科大学,南京210009 [3]南京医科大学第一附属医院国家药物临床研究机构,南京210009

出  处:《中国药房》2013年第38期3610-3612,共3页China Pharmacy

摘  要:目的:建立测定人血浆中噻托溴铵浓度的方法,考察健康志愿者口腔吸入噻托溴铵粉雾剂1粒后的主要药动学参数。方法:以C18固相萃取小柱提取浓缩血浆中的活性成分tiotropium(含tiotropium 18μg)后进行液-质联用(LC-MS)法分析,流动相为40 mmol/L乙酸铵缓冲液-甲醇(56∶44);检测离子分别为m/z 392.0(tiotropium[M]+)、m/z 192.3(内标,[M-Cl]+),裂解电压为200V。结果:tiotropium血药浓度在1.507~30.15 pg/ml范围内线性关系良好(r=0.999 6),最低定量限为1.507 pg/ml;日内、日间RSD均≤7%,相对回收率为100.6%~108.6%,提取回收率为89.2%~96.4%。男女受试者的药动学参数分别为:t1/2(103.7±14.6)、(110.9±14.6)h,tmax(8.3±5.2)、(8.3±5.2)h,cmax(16.65±8.22)、(16.26±3.10)pg/ml,AUC0-24 h(60.9±15.1)、(62.4±7.8)pg·h/ml。结论:本试验建立的分析方法灵敏、准确、简便。OBJECTIVE: To develop a method for the determination of tiotropium in human plasma and to investigate main pharmacokinetic parameters of tiotropium in healthy volunteers after oral inhalation of Tiotropium bromide inhalation powder. METHODS: C18 solid phase extraction column was used to extract tiotropium (18 μg) and analyzed by LC-MS. The mobile phase consisted of 40 mmol/L ammonium acetate buffer solution-methanol (56:44). The selected ion monitoring (SIM) mode used target ions at m/z 392.0 for tiotropium ([M]+) and m/z 192.23 for benzyltriethyl ammoniachloride (IS, [M--C1]~). The fragmentary voltage was 200 V. RESULTS: The linear range of tiotropium was 1.507-30.15 pg/ml (r=0.999 6). The lowest limit of quantification was 1.507 pg/ml. RSD of inter-day and intra-day were all lower than 7% ; relative recoveries in male and female were 100.6%-108.6% and extraction recoveries were 89.2%-96.4%. The main pharmacokinetic parameters of tiotropium were as follows: t1/2 (103.7 + 14.6) h and (110.9± 14.6) h; tmax (8.3 ± 5.2)h and (8.3 ± 5.2)h; cmax (16.65 ± 8.22) pg/ml and(16.26 ± 3.10) pg/ml; AUC0-24 h (60.9 ± 15.1 ) pg. h/ml and (62.4 ± 7.8) pg. h/ml. CONCLUSIONS: The method is proved to be sensitive, accurate and convenient. KEY WORDS Tiotropium; Tiotropium bromide inhalation powder; Solid phase extraction; LC-MS; Pharmacokinetics

关 键 词:TIOTROPIUM 噻托溴铵粉雾剂 固相萃取 液-质联用法 药动学 

分 类 号:R969.1[医药卫生—药理学]

 

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