Molecular imprint-based sensors in contaminant analysis

Molecular imprint-based sensors in contaminant analysis 

Sample extraction and preparation remain the most time-consuming and error-prone steps in the analytical process, but these are crucial procedures because food scientists need to isolate and concentrate a wide variety of analytes from complex and varied matrices. Advances in sample extraction and preparation in chemical analysis have only in the past several years been given critical consideration as an important component in obtaining reliable and robust analytical results. This situation is also true of analyses carried out in other industrial sectors (e.g. chemical and microbiological contaminants in food, agriculture and environment). 

2 The principles of moleculariy imprinted polymer-based techniques 

In practice, the molecular imprinting process involves the following steps. 

The print molecule (e.g. clenbuterol) is dissolved in a porogen (e.g. acetonitrile) together with either one or two monomers (e.g. methacrylic acid and 4-vinylpyridine). This allows non-covalent complexes to form 

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