Investigation of a fibre optic copper sensor based on immobilised α-benzoinoxime (cupron)
| Autor: | Nikita Mahendra, Ramaier Narayanaswamy, Subramaniam Sotheeswaran, Philomena Gangaiya |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Optical fiber Metals and Alloys Analytical chemistry chemistry.chemical_element Condensed Matter Physics Reflectivity Copper Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Wavelength chemistry Continuous use law Reagent Materials Chemistry Gravimetric analysis Electrical and Electronic Engineering Instrumentation Layer (electronics) |
| Zdroj: | Sensors and Actuators B: Chemical. 90:118-123 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/s0925-4005(03)00044-3 |
| Popis: | α-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 560 nm 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 5–127 ppm. After measurement, the sensor can be regenerated for reuse by immersing the probe in 0.1 M HCl. With continuous use, the sensing layer was found to be stable for at least 3 days. The advantages of using α-benzoinoxime in this way are compared with its use in the traditional gravimetric and colorimetric way. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect