【摘要】 采用紫外光谱法研究了π电子受体四氯对苯醌(TCBQ)与电子供体氟罗沙星的荷移反应,结果表明,氟罗沙星与TCBQ在十二烷基硫酸钠(SDS)胶束体系中能形成稳定的荷移反应络合物,使其吸光度明显增强。据此建立了氟罗沙星简单、快速、准确和灵敏的分析方法。氟罗沙星浓度在06～24mg·L-1范围内符合比尔定律。r=09993。荷移络合物在326nm处的表观摩尔吸光系数为33×104L·mol-1·cm-1。本方法用于片剂中氟罗沙星含量的测定,其回收率为993%～998%,相对标准偏差为09%～23%。更多还原

【Abstract】 Charge-transfer (CT) reaction of chloranil (TCBQ) as a π-electron acceptor with fleroxacin (FLX) as an electron donor has been studied by ultraviolet spectrophotometry method. Experiment showed that FLX reacted with TCBQ in sodium dodecyl sulfate(SDS)micellar systems, and a stable complex was formed and the absorbency was remarkably enhanced. Therefore, a simple, rapid, accurate and sensitive method for the determination of FLX has been developed. Beer’s law is obeyed in the range of 0.6-24 mg·L~-1 of FLX and r=0.999 3. The apparent molar absorptivity of CT complexes at 326 nm is 3.3×104 L·mol~-1 ·cm~-1 . The composition of CT complex was found to be 1∶1 by Bent-French and curved intersection methods. The proposed method has been applied to the ~determination of ESL in tablets. The recoveries are 99.2%-99.7%. The relative standard deviation is 0.7%-2.1%. The proposed methods are suitable for the routine quality control of drug alone and in tablets or capsules without fear of interference caused by the excipients expected to be present in tablets or capsules.更多还原