Abstract
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.
Original language | English |
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Article number | 122103 |
Journal | Talanta |
Volume | 226 |
DOIs | |
Publication status | Published - 1 May 2021 |
Keywords
- Digital colorimetry
- Fluoride
- Immobilized reagents
- Polymethacrylate matrix
- Solid phase spectrophotometry
ASJC Scopus subject areas
- Analytical Chemistry