塔板理论流出曲线的统计特征  

Statistical Characteristics of Chromatographic Profile Based on the Plate Theory

作　　者：孔宏伟[1] 张维冰[1] 许国旺[1] 洪群发[1] 张玉奎[1] 

机构地区：[1]中国科学院大连化学物理研究所,国家色谱研究分析中心大连116011

出　　处：《分析化学》1999年第4期408-411,共4页Chinese Journal of Analytical Chemistry

摘　　要：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.The statistical characteristics of the chromatographic profile was studied based on the original formulation of Matin' s plate theory, and the expressions of the first origin moment and the second, thirdcentral moment (μ3) was gotten. The effect of various experimental conditions on chromatographic peakshape was discussed. It was directly proved that due to μ3> 0, the normal chromatographic peak wastailing one, and the peak shape was related to n and the capacity factor( k'). When n is very big and k' is big enough, the peak will tend to symmetry.

关 键 词：色谱 统计矩 塔板理论 流出曲线 

分 类 号：O657.7[理学—分析化学]