23 September 2017 Selective solvent-free chromium detection using cadmium-free quantum dots
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Abstract
Currently, the method of choice to test for the presence of chromium in water is to submit samples to a lab for testing. We present a simple field-ready test that is selective for the presence of chromium at concentrations of 100 ppb or greater. The Environmental Protection Agency maximum contaminant level (MCL) for total chromium is 100 ppb. This test uses a simple on/off fluorescent screening employing the use of silver indium sulfide (AgInS2) quantum dots (QDs). These QDs were impregnated into cotton pads to simplify field testing without the need for solvents or other liquid chemicals to be present. The change in fluorescence is instant and can be readily observed by eye with the use of a UV flashlight.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Heather A. Meylemans, Heather A. Meylemans, Alfred J. Baca, Alfred J. Baca, Lee R. Cambrea, Lee R. Cambrea, Gregory S. Ostrom, Gregory S. Ostrom, } "Selective solvent-free chromium detection using cadmium-free quantum dots," Journal of Nanophotonics 11(3), 036022 (23 September 2017). https://doi.org/10.1117/1.JNP.11.036022 . Submission: Received: 8 June 2017; Accepted: 18 August 2017
Received: 8 June 2017; Accepted: 18 August 2017; Published: 23 September 2017
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