NOVEL SURFACE MOLECULARLY IMPRINTED POLYMERS AS SOLID-PHASE EXTRACTION SORBENTS FOR SELECTIVE EXTRACTION OF DIHYDROXYBENZENES FROM ENVIRONMENTAL WATER SAMPLES

The novel surface molecularly imprinted polymer (MIP) with hydroquinone (HQ) as the template has been prepared and used as adsorbent for the solid-phase extraction (SPE). The selectivity of the polymer was checked towards several selected dihydroxybenzenes, such as HQ, catechol (CT) and resorcinol (RS). Under the optimized conditions, high sensitivity was achieved. Then, the method was applied to the analysis of selected phenols in spiked tap, lake and river water samples. High recoveries (>87.9%) for dihydroxybenzenes were obtained, and the method was found to be linear in the range 0.25-1000 ng ml(-1) with correlation coefficients (R-2) greater than 0.99, and repeatability relative standard deviation (RSD) below 6.2% in all cases. For analysis of 200 ml water samples, the method's detection limits (LODs) ranged from 0.028 to 0.053 ng ml(-1), and the limit of quantification (LOQs) from 0.093 to 0.178 ng ml(-1). These results showed the suitability of the MIP-SPE method for the selective extraction of a group of structurally related isomeric compounds.