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Abstract: Molecular imprint sorbent assays (MIAs) have been applied to an increasing number of analytes of medical and environmental interest: the sensitivities and selectivities of these assays are comparable to immunoassays employing biological antibodies. In a number of cases complete analytical procedures starting from raw samples (blood, plasma and urine) have been demonstrated. There have been significant advances in applying MIPs in new formats and in the use of non-radioisotope labels. Progress in the field is reviewed, with particular emphasis on the technical aspects and new innovations. It is demonstrated that many of the perceived drawbacks of molecular imprinted polymers (MIPs) do not hinder their application in competitive binding assays: Many MIAs have been applied in aqueous systems and a heterogenous distribution of binding sites is not problematic, provided the recognition sites which bind the probe most strongly are selective