Relationship between the retention characteristics on an alumina column and physico-chemical parameters of some environmental pollutants.
Relationship between the retention characteristics on an alumina column and physico-chemical parameters of some environmental pollutants.
复制标题
氧化铝柱的保留特性与某些环境污染物的物理化学参数之间的关系。
DOI：
10.1016/s0021-9673(99)01212-1
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
E. Forgács
中科院分区：
文献类型：
--
作者：
T. Cserháti;E. Forgács
研究了16种环境污染物在氧化铝和多孔石墨化碳（PGC）柱上以正己烷为洗脱剂的保留行为。氧化铝柱上确定的容量因子的对数和溶质的物理化学特性之间的关系，阐明了由主成分分析（PCA），然后由二维非线性映射。原来的12个变量可以减少到4个，只有10%的信息损失。容量因子的对数与溶质的氢供体和受体性质及其塔夫脱常数在PC负载的二维非线性图上形成簇，表明空间和电子参数在氧化铝载体上的保留机制中起着相当大的作用。醇类、芳烃类和氯代烷烃类在PC变量的二维非线性图上形成独立的簇，表明它们在氧化铝柱上的保留机理可能不同。溶质未保留在PGC表面上，证明在正相条件下氧化铝的保留能力可高于PGC的保留能力。
The retention behavior of 16 environmental pollutants was studied on alumina and porous graphitized carbon (PGC) columns using n-hexane as eluent. The relationship between the logarithm of the capacity factors determined on the alumina column and the physico-chemical characteristics of the solutes was elucidated by principal component analysis (PCA) followed by two-dimensional nonlinear mapping. The 12 original variables can be reduced to four with only a 10% loss of information. The logarithm of the capacity factor formed a cluster with the hydrogen donor and acceptor properties of the solutes and their Taft’s constant on the two-dimensional nonlinear map of PC loadings indicating that both steric and electronic parameters play a considerable role in the retention mechanism on alumina support. Alcohols, aromatics and chlorinated alkanes formed separate clusters on the two-dimensional nonlinear map of PC variables suggesting that their retention mechanism may be different on the alumina column. Solutes were not retained on the PGC surface proving that under normal-phase conditions the retention capacity of alumina can be higher than that of PGC.