建立了中空纤维液相微萃取(HFLPME)耦合高效液相色谱法(HPLC)用于测定血浆和尿液中大黄素及其代谢物的浓度,比较了中药有效成分大黄素在不同性别大鼠体内的吸收和代谢能力,阐述了大黄素在体内的代谢和转化过程.本实验以聚偏氟乙烯纤维为溶剂载体,正辛醇为萃取溶剂,对血浆和尿液样品进行HFLPME处理,萃取后挥干有机溶剂,用50μL甲醇溶解,进行HPLC测定.在优化的微萃取条件下,血浆和尿液样品中大黄素及其代谢物标准曲线线性良好(相关系数(r)大于0.9960)；检出限为0.1～3.0μg/L;富集倍数为12.2～26.3；日内、日间精密度(以相对标准偏差(RSD)计)小于11.0％；血浆和尿液中代谢物的平均回收率为97.9％～103％.HFLPME操作简单,富集倍数高,能有效去除生物样品中复杂基体的干扰,适用于复杂样品中微量、痕量成分分析物的分析测定.
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