本文从理论上提出了采用反相液相色谱作用指数进行已知保留值定性的方法,该方法是建立在反相液相色谱保留值基本方程Ink′=a+cC_B的基础上,通过建立各类样品标准的a,c指数库来实现保留值的预测,从而达到定性的目的,在定性过程中利用了参数a,c之间的线性关系以及双柱之间的a-a线性关系,在此基础上给出了一些典型的实例来验证这种定性方法的正确性。 In this paper, a method of qualitatively determining the retention value of a reversed-phase liquid chromatographic index is put forward theoretically. The method is based on the basic equations of ink retention time, Ink ’= a + cC_B, Class sample index a, c index library to achieve the prediction of the retention value, so as to achieve the purpose of qualitative, in the qualitative process using a linear relationship between the parameters a, c and the double column aa linear relationship between the basis Some typical examples are given to verify the correctness of this qualitative method.