摘要
分别从ｌｎｋ′ｎ＝Ａ·ｎ＋Ｂ′和Ｉｉ＝１００ｎ＋ｌｎｔ′Ｒ（ｉ）－ｌｎｔ′Ｒ（ｎ）ｌｎｔ′Ｒ（ｎ＋１）ｌｎｔ′Ｒ（ｎ）推导出利用色谱热力学函数计算保留指数（Ｉ）随柱温（Ｔ）变化的关系式Ｉｉ＝ａ′＋ｂ′Ｔｃ′＋Ｔ。实验证明：在一般气液色谱柱使用的温度范围内，不但可按该式准确地计算和预测各种物质在不同柱温下的保留指数，而且可利用该式中的常数ａ′ｂ′ｃ′判断各种物质保留指数随柱温的变化系数（Ｉ／Ｔ）的正负和求解Ａｎｔｏｉｎｅ型双曲函数式Ｉｉ＝ａ＋ｂｃ＋Ｔ中的常数项ａ、ｂ、ｃ。
A formula has been derived for calculating the change of the retain index as a function of column temperature using the thermodynamic function. The experiment showed that it may not only accurately calculate and predict the retain indexes of a variety of substanses under different column temperature, but also judge the positive or negative of the coefficients of index change as column temperature change with constants in the formula and solve out the constants in the hyperbolic fuction of Antoine type.
关键词
热力学函数
保留指数
柱温
色谱
公式推导
thermodynamic functionretain indexcolumn temperaturechromatograph
