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Figure 1: Principle of molecular imprinting: MIPs are prepared by allowing a network polymer to form, in presence of a template, a structure able to target analytes. Elimination of the template, after polymerization, leaves behind a cavity, which is complementary to the template in terms of size and shape. MIPs can be programmed to recognize a large variety of small molecules (SciTopics. Retrieved August 7, 2012, from http://www.scitopics.com/Molecular_Imprinting.html).