【摘要】 氟罗沙星在紫外光的照射下易发生光解作用。依据氟罗沙星的光解产物与Zn2+离子形成配合物,能显著地增敏氟罗沙星的荧光强度,建立了敏化荧光分析氟罗沙星的新方法。探讨了酸度、[Zn2+]/[PHFLRX]浓度比和光照等对荧光强度的影响。结果表明该方法的线性范围为5.0×10-8～5.0×10-6mol·L-1,检出限为4.2×10-8mol·L-1。对浓度为5.0×10-7mol·L-1的氟罗沙星平行测定20次,计算其相对标准偏差(RSD)为1.7%。对针剂、片剂和尿样中的氟罗沙星分别进行了测定,其回收率为95.0%～105.0%。并在实验的基础上,对其机理进行了合理的推测。更多还原

【Abstract】 Based on the complex formed by Zn~ 2+ which can strengthen the relative fluorescence intensity of fleroxacin evidently, a novel photochemical fluorescence method was developed. The effects of the acidity, the concentration ratio of Zn~ 2+ to fleroxacin, and the time for illumination were studied. Under the optimum experiment conditions, the linear range of the determination was 5.00×10~ -8-5.00×10~ -6 mol·L~ -1. The detection limit was 4.2×10~ -8 mol·L~ -1. The relative standard deviation of the determination of fleroxacin (5.0×10~ -7 mol·L~ -1) was 1.7% (n=20). The method was successfully applied to the determination of fleroxacin in specimens, and the recoveries were in the range of 95.0%-105%. The mechanism of this system is proposed.更多还原