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该文建立了以0.1MOL/LHCL为介质,采用三阶导数光谱法,同时测定甲硝唑和维生素B6的新方法.方法检测限为0.81μG/ML甲硝唑和0.16μG/ML维生素B6.二者测定的线性范围均为1.6~22.4μG/ML,直接用于复方甲硝唑片剂中甲硝唑和维生素B6的测定.两种物质的测定变异系数分别小于2.26和2.60％,回收率分别为93~102％和99~101％.“,”A new method for simultaneous determination of metronidazolum and vitamin B?6 was established by the third derivative spectrophotometry in 0.1mol/L HCl solution.The detection limits were 0.81μg/mL for metronidazolum and 0.16μg/mL for vitamin B.6.The linear range of determination was 1.6～22.4μg/mL for both metronidazolum and vitamin B.6.This method has been applied to the determination of metronidazolum and vitamin B?6 in tabellae metronidazoli compositae with satisfactory results.The coefficients of variati...