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Sensors 2010, 10(12), 11530-11555; doi:10.3390/s101211530

Nitrite Biosensing via Selective Enzymes—A Long but Promising Route

REQUIMTE—Departmento de Química, Faculdade de Ciencias e Tecnologia (UNL), 2829-516 Monte Caparica, Portugal
Escola Superior de Saude Egas Moniz, Campus Universitario, Quinta da Granja, 2829-511 Monte Caparica, Portugal
Author to whom correspondence should be addressed.
Received: 9 October 2010 / Revised: 19 November 2010 / Accepted: 6 December 2010 / Published: 15 December 2010
(This article belongs to the Special Issue Bio-devices and Materials)
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The last decades have witnessed a steady increase of the social and political awareness for the need of monitoring and controlling environmental and industrial processes. In the case of nitrite ion, due to its potential toxicity for human health, the European Union has recently implemented a number of rules to restrict its level in drinking waters and food products. Although several analytical protocols have been proposed for nitrite quantification, none of them enable a reliable and quick analysis of complex samples. An alternative approach relies on the construction of biosensing devices using stable enzymes, with both high activity and specificity for nitrite. In this paper we review the current state-of-the-art in the field of electrochemical and optical biosensors using nitrite reducing enzymes as biorecognition elements and discuss the opportunities and challenges in this emerging market.
Keywords: nitrite, biosensors; nitrite reductases; electrochemical transducers nitrite, biosensors; nitrite reductases; electrochemical transducers

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Almeida, M.G.; Serra, A.; Silveira, C.M.; Moura, J.J. Nitrite Biosensing via Selective Enzymes—A Long but Promising Route. Sensors 2010, 10, 11530-11555.

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