采用模糊集有关理论对所有可能影响保留指数定性准确度因素通过隶属函数表示出来。本方法弃之以传统“定性窗口”的概念,代之以隶属度,并根据最大隶属原则定性。不仅如此,本方法尚具有“窗口”定性法不具备的多种优点,使得定性可靠性大大增加。而且本方法还为定性结果优化、因素校正提供了有效的手段。经过对任意多阶方式下石脑油组分定性分析证明了其特有的作用。 Using the theory of fuzzy sets, all the factors that may influence the qualitative accuracy of retention index are expressed by membership function. This method discards the traditional concept of “qualitative window” and replaces it with the degree of membership, and defines it according to the principle of maximum membership. Not only that, this method still has a variety of advantages that the “window” qualitative method does not have, which greatly increases the qualitative reliability. Moreover, this method is also an effective means to optimize qualitative results and factor correction. Qualitative analysis of the naphtha component under any multistage approach proves its unique effect.