直接从原始塔板理论的级数形式色谱流出曲线表达式出发,得到了流出曲线一级原点矩及二,三级中心矩的数学表达式,并依此讨论了色谱峰的形状特征及各种因素对峰形的影响规律.本文结果直接证实原始塔板理论曲线为不对称分布,描述峰型不对称性的偏态系数与塔片数及容量因子有关,且随容量因子的增大逐渐变小.当塔片数很大时,容量因子不很小的组分流出曲线有相似的对称性. Starting from the chromatographic outflow curve expression of the original plate theory, the mathematical expressions of the first moment of origin and the second and third centrometrical moments of the outflow curve are obtained. Based on this, the shape and characteristics The influence of the factors on the peak shape.The results of this paper directly prove that the theoretical curve of the original plate is asymmetric distribution, the skew coefficient describing the peak asymmetry is related to the number of plates and the capacity factor, and gradually changes with the increase of capacity factor When the number of towers is large, the component outflow curve with a small capacity factor has a similar symmetry.