毛细管电泳-化学发光法用于兔血中贝诺酯代谢物的分析

建立了一种用于药物在体内微量代谢物分析的毛细管电泳与化学发光在线联用方法，采用自制毛细管电泳-化学发光联用装置，对家兔血液中贝诺酯的活性代澍物扑热息痛进行了分析。考察了各种影响因素后，得到优化的电泳分离条件。在优化条件下，监测了贝诺酯灌胃后家免血液中扑热息痛的含量变化。扑热息痛含量在贝诺酯灌胃后4h达到峰值，扑热息痛的回收率为90％～115％，峰面积的RSD为2．1％-2．9％。本方法快速简单，检测灵敏度高，干扰小，适用于生物样品的分析。     

Determination of benorilate in pharmaceutical formulations and its metabolite in urine at carbon paste electrode modified by silver nanoparticles

Benorilate was determined by the differential pulse voltammetry (DPV) using a carbon paste electrode modified by silver nanoparticles in 1.25 × 10⁻³ mol l⁻¹ KH₂PO₄ and Na₂HPO₄ buffer solution (pH = 6.88, 25 °C) .The anodic peak potential was +0.970 V (versus SCE). A good linear relationship was realized between the anodic peak currents and benorilate concentrations in the range of 1.0 × 10⁻⁷ to 2.5 × 10⁻⁴ mol l⁻¹ with the detection limit of 1.0 × 10⁻⁸ mol l⁻¹. The recovery was 95.2-103.6% with the relative standard deviation of 3.6% (n = 9). The pharmaceutical preparations, benorilate tablets samples and its metabolite (salicylic acid) in urine were determined with the desirable results.