Summary
A practical liquid chromatographic early-warning system for polar pollutants in water ought to have detection limits at a level below a microgram per litre. Using ultraviolet absorbance detection this normally necessitates trace enrichment of the samples. In this study ten different sorbents have been tested with respect to their enrichment capacity. The hydrophobic polymeric PLRP-S material, in combination with a C-18 modified analytical column, proved to be the best choice. The influence of humic substances, present in surface water, was also studied. Lowering of the sample pH, resulted in a significant increase in the interferences due to the humic substances.
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Liska, I., Brouwer, E.R., Lingeman, H. et al. Trace enrichment of polar pollutants from water and the influence of humic substances. Chromatographia 37, 13–19 (1993). https://doi.org/10.1007/BF02272181
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DOI: https://doi.org/10.1007/BF02272181