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Investigation of a fibre optic copper sensor based on immobilised α-benzoinoxime (cupron)

Mahendra, Nikita and Gangaiya, Philomena and Sotheeswaran, Subramaniam and Narayanaswamy, R. (2003) Investigation of a fibre optic copper sensor based on immobilised α-benzoinoxime (cupron). Sensors and Actuators B, 90 (1). pp. 118-123. ISSN 0925-4005

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alpha-Benzoinoxime, a highly selective reagent used for the gravimetric and colorimetric determination of copper, was successfully immobilised on XAD-2 and coupled with optical fibres to investigate a sensor-based approach for determining copper. Reflectance measurements were used to quantify sensor response. Optimum response was obtained at a wavelength of 560nm and at a solution pH of 7. Using a kinetic approach in which the rate of change of reflectance is measured over a 4-min period, the response was found to be linear in the range 5-127ppm. After measurement, the sensor can be regenerated for reuse by immersing the probe in 0.1M HCl. With continuous use, the sensing layer was found to be stable for at least 3 days. The advantages of using alpha-benzoinoxime in this way are compared with its use in the traditional gravimetric and colorimetric way.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User: Ms Mereoni Camailakeba
Date Deposited: 23 Apr 2003 08:58
Last Modified: 04 May 2012 03:50

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