根据吸光度比值—导数光谱法兼具导数光谱法可消除低频背景干扰,以及MLRA法光谱分辨能力强的特点,研究了用该方法测定苯酚和间苯二酚二元混合物的有效性。结果表明,吸光度比值—导数光谱法对模拟样品的测定分析达到了检测要求;该方法具有良好的精密度与准确度,用于吸收峰严重重叠的二元混合物时,毋须对干扰组分分离而可直接测定,方法简便快速,利于推广。 According to the ratio of absorbance - derivative spectroscopy and derivative spectroscopy to eliminate low frequency background interference and the strong spectral resolution of MLRA, the method was used to determine the effectiveness of the binary mixture of phenol and resorcinol. The results show that the absorbance ratio - derivative spectroscopy meets the testing requirements for the determination of analog samples. The method has good precision and accuracy. When used to absorb binary mixtures with severe overlapping peaks, it is not necessary to separate the interfering components Can be directly measured, the method is simple and quick, conducive to the promotion.