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采用无水乙醇作稀释剂及双波长分光光度法排除了醋酸洗必素与甲硝唑而组分测定时的相互干扰，建立了复方醋酸洗必泰溶液的测定方法．醋酸洗必素的回收率为10003％（n＝7），RSD=0．15％，甲硝唑回收率为99．91％（n=7），RSD=0.51％．
The determination of compound chlorhexidine acetate solution was established by using anhydrous ethanol as diluent and dual-wavelength spectrophotometry to eliminate the mutual interference of chlorhexidine acetate with metronidazole and the determination of components. The recovery of chlorhexidine acetate was 10003% (n = 7), RSD = 0.15%, metronidazole recovery was 99.91% (n = 7), RSD = 0.51%.