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Sensors 2016, 16(8), 1190; doi:10.3390/s16081190

Practical Application of Electrochemical Nitrate Sensor under Laboratory and Forest Nursery Conditions

1
Department of Chemistry, Laval University, Quebec, QC G1V 0A6, Canada
2
Ministère des Forêts, de la Faune et des Parcs, Direction de la recherché forestière, Quebec, QC G1P 3W8, Canada
3
Centre for Optics, Photonics and Lasers (COPL), Laval University, Quebec, QC G1V 0A6, Canada
4
JIRU Instituto de Quimica, Araraquara-SP 14800-060, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Simon X. Yang
Received: 19 April 2016 / Revised: 16 July 2016 / Accepted: 22 July 2016 / Published: 28 July 2016
(This article belongs to the Special Issue Sensors for Agriculture)
View Full-Text   |   Download PDF [2506 KB, uploaded 28 July 2016]   |  

Abstract

The reduction of nitrate leaching to ensure greater protection of groundwater quality has become a global issue. The development of new technologies for more accurate dosing of nitrates helps optimize fertilization programs. This paper presents the practical application of a newly developed electrochemical sensor designed for in situ quantification of nitrate. To our knowledge, this paper is the first to report the use of electrochemical impedance to determine nitrate concentrations in growing media under forest nursery conditions. Using impedance measurements, the sensor has been tested in laboratory and compared to colorimetric measurements of the nitrate. The developed sensor has been used in water-saturated growing medium and showed good correlation to certified methods, even in samples obtained over a multi-ion fertilisation season. A linear and significant relationship was observed between the resistance and the concentration of nitrates (R2 = 0.972), for a range of concentrations of nitrates. We also observed stability of the sensor after exposure of one month to the real environmental conditions of the forest nursery. View Full-Text
Keywords: electrochemical sensor; electrochemical impedance spectroscopy; forest nursery; growing medium; nitrate electrochemical sensor; electrochemical impedance spectroscopy; forest nursery; growing medium; nitrate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Caron, W.-O.; Lamhamedi, M.S.; Viens, J.; Messaddeq, Y. Practical Application of Electrochemical Nitrate Sensor under Laboratory and Forest Nursery Conditions. Sensors 2016, 16, 1190.

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