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首页> 外文期刊>Environmental toxicology and chemistry >THE APPLICATION OF HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY HUMIC ACID COLUMNS IN DETERMINATION OF K_(oc) OF POLYCYCLIC AROMATIC COMPOUNDS
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THE APPLICATION OF HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY HUMIC ACID COLUMNS IN DETERMINATION OF K_(oc) OF POLYCYCLIC AROMATIC COMPOUNDS

机译:高效液相色谱腐殖酸色谱柱在多环芳族化合物K_(oc)测定中的应用

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摘要

An improvement of a method for determination of the distribution coefficient for polycyclic aromatic compounds (PAC) between organic carbon and water (K_(oc)) by high-performance liquid chromatography (HPLC) is presented in this paper. By use of silica-based HPLC columns with chemically immobilized humic acid (Aldrich, Zigma-Aldrich, Taufkirchen, Germany), the retention of PAC to humic acid can be measured, and the results can, when they are compared to those from a blank column, be used to a direct determination of K_(oc). These values agree quite well with literature K_(oc) values for two- to four-ringed PAC. Our work has shown that it is possible to use this method to investigate how environmental parameters like electrolyte concentration, pH, and temperature affect the sorption of PAC to humic acid. Thermodynamic parameters can be estimated from variable temperature experiments. The advantage of the method is its cost and manpower effectiveness.
机译:本文提出了一种通过高效液相色谱(HPLC)测定有机碳与水(K_(oc))之间的多环芳族化合物(PAC)分配系数的方法的改进。通过使用化学固定的腐殖酸(基于Aldrich,Zigma-Aldrich,Taufkirchen,德国)的硅胶HPLC色谱柱,可以测量PAC对腐殖酸的保留率,并将其与空白样品进行比较列,用于直接确定K_(oc)。这些值与两环至四环PAC的文献K_(oc)值非常吻合。我们的工作表明,可以使用这种方法研究诸如电解质浓度,pH和温度等环境参数如何影响PAC对腐殖酸的吸附。可以从可变温度实验中估算热力学参数。该方法的优点是其成本和人力效率。

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