Electrochemical sensors recognition elements

Electrochemical sensors operate efficiently if (1) a suitable biological or chemical recognition element is selected, (2) immobilized onto an electrode surface or in a membrane and (3) an appropriate electroanalytical transduction scheme is applied. 

Haupt, K. (2004) Molecularly imprinted polymers as recognition elements in sensors. In O.S. Wolfbeis (Ed.) Ultrathin Electrochemical Chemo-and Biosensors. Springer. 

EXAMPLES OF DIFFERENT TYPES OF RECOGNITION ELEMENTS USED IN ELECTROCHEMICAL SENSORS... 

During the last decade the number of application of MIP-based sensors has increased dramatically. The high selectivity and affinity of MIPs for target analytes make them ideal recognition elements in the development of sensors. Capacitive (Panasyuk etal., 2001), conductimetric (Piletsky et al., 1995), field effect (Lahav et al., 2004), amper-ometric (Kritz and Mosbach, 1995), and voltammetric (Pizzariello et al., 2001), electrochemical transduction systems have been used. Sensors based on conductimetric transduction have been developed by Piletsky et al. (1995) for the analysis of herbicides. A system using a TiC>2 sol-gel system, and with a linear range of 0.01-0.50 mg L-1 for atrazine, without interference of simazine, and chloroaromatic acids has been described by Lahav et al. (2004). 

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