Fluorescent-based chemical sensor for organophosphate detection

Špela Korent Urek; Aleksandra Lobnik

doi:10.1117/12.887051

6 May 2011 Fluorescent-based chemical sensor for organophosphate detection

Špela Korent Urek, Aleksandra Lobnik

Proceedings Volume 8073, Optical Sensors 2011; and Photonic Crystal Fibers V; 80730Y (2011) https://doi.org/10.1117/12.887051
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

Abstract

We present a new optical sensor for the detection of organophosphates by incorporating fluorescent indicator dye into sol-gel material. We used different configurations of immobilization matrices such as thin film and spherical nanoparticles. The sensor thin films were prepared by using acid-catalyzed sol-gel process and the spherical nanoparticles by modified Stöber method. The effects of configuration matrices on the sensor's characteristic were studied. The use of dye-doped nanoparticles improved the detection limit from 0.69 μM to 17 nM, response time from 600 s to 12 s, precision and sensitivity, but reduced the sensor's working rage from 6.9×10^-7 M - 6.9×10^-3 M to 1.75×10^-8M - 2.3×10^-7 M.

Citation Download Citation

Špela Korent Urek and Aleksandra Lobnik "Fluorescent-based chemical sensor for organophosphate detection", Proc. SPIE 8073, Optical Sensors 2011; and Photonic Crystal Fibers V, 80730Y (6 May 2011); https://doi.org/10.1117/12.887051

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