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系统考察了55种非离子型化合物(包括11个氯代苯类、14个烷基苯类、22个多苯和多环芳烃类化合物、8个农药)在土壤淋溶柱色谱和较宽的淋洗剂(甲醇水)组成范围内容量因子(k′)与甲醇体积分数(φ)的关系。用自制加压装柱机将标准土壤干法装填成10mmi.d.×100mm的液相色谱柱,φ=0～0.80的等度淋洗剂的流速1mLmin-1,柱温(25.0±0.1)℃,用UV检测器在线检测。实验表明,logk′=logk′w+aφ+bφ2和logk′=logk′w-Sφ两式均可以用来描述保留规律,但后者因其计算简单、实验数据点不需太多,可更好地满足实验要求。还解释了同系列的同系物(甲基苯类、正构烷基苯类)和弱极性氯代苯类中存在的logk′,logk′w,S的碳(或氯)数规律,该规律中的斜率m和截距b间也存在线性相关,且均随φ的增大而线性地减少。
55 nonionic compounds (including 11 chlorobenzenes, 14 alkyl benzenes, 22 polyphenyls and polycyclic aromatic hydrocarbons, 8 pesticides) were systematically investigated in a leaching column chromatography and a broad Relationship between capacity factor (k ’) and methanol volume fraction (φ) in the eluent (methanol water) composition range. The standard soil was dry-packed into a 10mm × d × 100mm LC column with a home-made pressure-packed column machine at a flow rate of 1mL min-1 with an isocratic eluent of φ = 0 ~ 0.80. The column temperature (25.0 ± 0.1) ℃, with UV detector online testing. Experiments show that logk ’= logk’w + aφ + bφ2 and logk’ = logk’w-Sφ can be used to describe the retention law, but the latter because of its simple calculation, the experimental data points do not need too much, but more Good to meet the experimental requirements. Also explained the same series of homologues (methylbenzenes, n-alkylbenzenes) and weak polar chlorobenzenes logk ’, logk’w, S of the number of carbon (or chlorine) number of the law, the There is also a linear correlation between the slope m and the intercept b in the law, and both decrease linearly with the increase of φ.