ABSTRACT
OBJECTIVE:To establish a New Vierordt method for assaying ingredients in compound fleroxacin suppositories and compound fleroxacin ear drops METHODS:New Vierordt method was applied to determination of fleroxacin and tinidazole in compound fleroxacin suppositories and fleroxacin and metronidazole in compound fleroxacin ear drops with no need of separation RESULTS:The fleroxacin and tinidazole in compound fleroxacin suppositories were detected at wavelength 286nm and 317nm respectively The average recoveries were 100 17% and 99 96% with RSDs=0 44% and 0 37% respectively The fleroxacin and metronidazole in the compound fleroxacin ear drops were detected at wavelength 286nm and 318nm respectively The average recoueries were 100 65% and 99 92% with RSDs=0 65% and 0 21% respectively CONCLUSION:The New Vierordt method can be used for quality control of the two compound preparations because of its convenience,accuracy and good repeatability and can eliminate mutual interference of two ingredients in preparations
ABSTRACT
OBJECTIVE:To determine the contents of fleroxacin and tinidazole in compound fleroxacin suppository METH_ODS:RP-HPLC was used,the detecting conditions:ODS-C18 column;mobile phase,0 05mol/L lemon acid-acetonitrile(65∶35),was modulated to pH=4 0 with triethylamine;flow rate 0 8ml/min;external standard method;detective wavelength 300nm RESULTS:Linear ranges were 9 92～79 36?g/ml(for fleroxacin) 20 32～162 56?g/ml(for tinidazole) respectively wh_ere the peak areas were correlative with the concentrations,r=0 9 974 and 0 9 995 The average recoveries were 101 6% and 100 1% and RSDs was 1 4% and 1 2% respectively CONCLUSION:This detecting method is simple,rapid,accurate and suitable for determination of the contents of this preparation