高效液相色谱法测定人体5-氟尿嘧啶血药浓度

目的 :以高效液相色谱法测定人血浆中5 -氟尿嘧啶的浓度。方法 :用硫酸铵作为蛋白沉淀剂 ,血浆样品用乙酸乙酯 -异丙醇(85∶15 ,V/V )提取 ,氮气吹干 ,残留物用流动相溶解后进样。色谱柱为DiamonsilC18 柱 (4 6mm×150mm ,5μm ) ,流动相为0 01mol/LKH2PO4(pH5 5) ,流速1 5ml/min ,紫外检测波长267nm ,5 -溴尿嘧啶为内标。结果 :本法最低检测浓度为0 025μg/ml ,线性范围为0 3～10μg/ml ,日内RSD≤5 0 % (n=5) ,日间RSD≤11 5 % (n=5)。结论 :本法简便、灵敏、经济 ,可作为5 -氟尿嘧啶药代动力学研究时血药浓度的测定方法。

Determination of the Concentration of 5- Fluorouracil in Human Plasma With HPLC

OBJECTIVE:To establish a HPLC method for the determination of 5-fluorouracil in human plasma METHODS:The plasma samples were extracted with ethyl acetate-isopropanol(85∶15,V/V)following precipitation of plasma proteins with ammonium sulfate The solvent was evaporated to dryness under a stream of nitrogen The dry extract was dissolved in mobile phase and then injected into the Diamonsil C18 column(150mm×4 6mm,5μm)and 0 01mol/L KH2 PO4(pH5 5) was taken as mobile phase The flow rate was 1 5ml/min,UV detection wavelength was 267nm The internal standard was 5-bromouracil RESULTS:The minimal detectable drug concentration in plasma was 0 025μg/ml The calibration curve was linear over a range from 0 3μg/ml to 10μg/ml The intra-day RSD≤5 0%(n=5) and the inter-day RSD≤11 5%(n=5) CONCLUSION:The method can be used for studying the pharmacokinetics and bioavailability of 5-fluorouracil