Smartphone-based colorimetric determination of fluoride anions using polymethacrylate optode
Saranchina N.V. Slizhov Y.G. Vodova Y.M. Murzakasymova N.S. Ilyina A.M. Gavrilenko N.A. Gavrilenko M.A.
1 May 2021Elsevier B.V.
Talanta
2021#226
We developed a new transparent polymer optode based on polymethacrylate with Zr(IV) and alizarin red complex immobilized into it for digital colorimetric and solid-phase spectrophotometric determination of fluoride anions. The matrix changes its colour from purple to yellow after it contacts fluoride anion. We developed a processing algorithm for coloured images which helps calculate mean value for the RGB colour-coordinate system in a selected optode image and translates it into a fluoride concentration value. The analytical signal of the suggested method has a linearity range of 0.1–30 mg⋅L−1 with the detection limit 0.03 mg⋅L−1. Compared to other methods, the modified polymethacrylate matrix is actually a ready-to-use colorimetric system offering rapid results for drinking water quality control.
Digital colorimetry , Fluoride , Immobilized reagents , Polymethacrylate matrix , Solid phase spectrophotometry
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Tomsk Polytechnic University, Tomsk, Russian Federation
Tomsk State University, Tomsk, Russian Federation
Taraz State University, Taraz, Kazakhstan
Tomsk Polytechnic University
Tomsk State University
Taraz State University
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