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在系数倍率法的基础上提出一种新的分光光度法-双浓度系数倍率法.应用新法测定了复方丁卡因注射液.理论和实验初步证明了新法可用于一些组分吸收差异较大的双组分混合物的测定.“,”Based on k-ratio method, a new computational spectrophotometry-two-concentration k-ratio spectrophotometry is proposed. The determination of compound tetracaine hydrochloride using the method is described.Theory and exprements show that two-component mixtures with their different absorption values can be determined using this method.