Molecular imprinting techniques allow the preparation of polymeric rec
eptors which bind small molecules with affinities and selectivities of
the same order as those observed in the binding of antigens by antibo
dies. The molecular imprinting technology has now reached a stage wher
e the commercial use of imprinted materials is being assessed, notably
for separations requiring strong and selective binding of small molec
ules. This development is driven by the potential advantages of polyme
ric receptors over biological in terms of stability, capacity, cost an
d ease of preparation. In this short review the state of the art of no
ncovalent imprinting is summarised indicating a few areas in analytica
l chemistry where the technique may have future impact.