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目的:制备一种以环丙沙星与四苯硼钠缔合物为活性物的PVC膜环丙沙星选择性电极。方法:用此电极以标准曲线法对盐酸环丙沙星及其两种制剂进行含量测定。结果:电极的响应范围10~(-1)~10~(-5)mol·L~(-1),斜率为37.4 mV/pC,平均回收率为97.7%,RSD=2.4%(n=8)。结论:方法灵敏度高,操作简便,结果与HPLC法相符。
OBJECTIVE: To prepare a ciprofloxacin selective PVC membrane electrode based on the association of ciprofloxacin and sodium tetraphenylborate. Methods: The content of ciprofloxacin hydrochloride and its two preparations were determined by this standard curve method. Results: The response range was 10 ~ (-1) ~ 10 ~ (-5) mol·L -1 and the slope was 37.4 mV / pC. The average recovery was 97.7% and RSD was 2.4% (n = 8 ). Conclusion: The method is sensitive and easy to operate. The results are consistent with those of HPLC method.