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在pH 4.39的乙酸钠-盐酸缓冲溶液中,盐酸环丙沙星与刚果红发生离子缔合反应,其最大吸收波长位于500nm处,表观摩尔吸光系数ε=9.46×104L/(mol.cm),盐酸环丙沙星浓度在0.8—3.2mg/L范围内呈良好的线性关系,线性回归方程为A=0.3635+0.01113C(mg/L),相关系数r=0.9966;检出限为9ng/L;RSD为1.6%,据此建立了测定盐酸环丙沙星的新方法。优化了对盐酸环丙沙星的测定条件。本法仪器设备简单,操作简便,体系稳定,回收率测定结果较满意。
In pH 4.39 sodium acetate-hydrochloric acid buffer solution, ciprofloxacin hydrochloride and Congo red ion-association reaction, the maximum absorption wavelength at 500nm, the apparent molar absorptivity ε = 9.46 × 104L / (mol.cm) , The concentration of ciprofloxacin hydrochloride in the range of 0.8-3.2mg / L showed a good linear relationship, the linear regression equation was A = 0.3635 + 0.01113C (mg / L), the correlation coefficient r = 0.9966; detection limit of 9ng / L; RSD of 1.6%, thus establishing a new method for the determination of ciprofloxacin hydrochloride. Optimization of the determination of ciprofloxacin hydrochloride conditions. The equipment of this Law is simple, easy to operate, the system is stable, the determination of the recovery rate is satisfactory.