Application of HPLC capacity coefficients to characterize the sorption of polycyclic aromatic compounds to humic acid |
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Authors: | Nielsen T Helweg C Siigur K Kirso U |
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Institution: | Chemical Reactivity, Department of Environmental Science and Technology, MIL 313, Ris? National Laboratory, P.O. Box 49, DK-4000, Roskilde, Denmark. |
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Abstract: | The sorption coefficients to humic acid of 46 PAC having a wide range in polarity were compared with the capacity coefficients of the PAC to a non-polar HPLC column material (ODS) and a polar one (Diol). It is shown that polar interactions contribute to the sorption of polar PAC in addition to the non-polar interactions. The results also suggest that humic acid may contain different hydrophilic adsorption sites. The non-polar column material was only the best model substrate, if the test materials were limited to the hydrophobic unsubstituted PAC, PAH+O,S-PAC. |
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