MOF and CdTe quantum dots entrapped hydrogel film as dual-signal ratiometric fluorometric-colorimetric sensing platform for erythromycin detection: Portable smartphone-assisted visual sensing in milk and water samples.

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ID: 282950
2025
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Abstract
In this study, we have established a portable, sensitive, and efficient method for the detection of erythromycin (ERY) in serum, as well as in food samples, including milk and water, which present a significant challenge. Herein, we have designed a polyvinyl alcohol (PVA) hydrogel film platform that facilitates a dual-mode ratiometric fluorescence/colorimetry sensing system using an aluminum metal-organic framework (Al-MOF) with the emission wavelength of 418 nm and CdTe QDs at the emission wavelength of 528 nm as fluorophores. The variation of the I/I ratio versus ERY concentration was linear at a concentration range of up to 242 nM and 728 pM with a detection limit of 2.16 nM and 2.42 pM in liquid state and hydrogel film, respectively. This solid-state assay indicates a 500-fold improvement in sensitivity compared to the liquid state and also strong selectivity observed for ERY over other drugs such as amoxicillin, ceftazidime, and so forth. Furthermore, a visual sensing platform supported by smartphones was developed to accurately determine ERY by identifying the precise variations in RGB values. Additionally, this assay was effectively used to detect ERY in serum, tap water, and milk samples with exceptional sensitivity and accuracy in both liquid and hydrogel forms.
Reference Key
azeez2025mof Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Azeez, Kurdistan Fakhraldin; Salimi, Abdollah; Hallaj, Rahman
Journal Food chemistry
Year 2025
DOI
10.1016/j.foodchem.2025.143972
URL
Keywords
smartphone quantum dots erythromycin aluminum-metal organic framework dual-mode detection hydrogel film state ratiometric fluorescence assay visual sensing

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