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Updated: Aug 29, 2026

Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers
Published on: May 5, 2016
Tunable ultraviolet laser-induced fluorescence detection of trace plastics and dissolved organic compounds in water
Vasanthi Sivaprakasam1, Dennis K Killinger
1Department of Physics, 4202 East Fowler Avenue, University of South Florida, Tampa, Florida 33620-9951, USA.
Abstract:
We developed a tunable (220-285-nm) UV and fixed 266-nm laser-induced fluorescence (LIF) system using a spectrometer and a cooled CCD imaging detector to measure the excitation-emission matrix spectra of various compounds in water, including quinine sulfate and plastic compound bisphenol-A. The LIF instrument was used for the fast, nonspecific determination of trace amounts of dissolved organic compounds present in natural water supplies and various brand name bottled distilled water and bottled drinking water. Plastic-related compounds that leached out of plastic utensils and containers were also detected with this instrument. The sensitivity of the system was approximately 1-2 orders of magnitude better than that for a commercial system.
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