Carbon dots-adorned silver nanoparticles as a straightforward sustainable colorimetric sensor for the rapid detection of ketotifen in eye drops and aqueous humor

Saad, Aya Magdy; El-Deen, Asmaa Kamal; Nasr, Jenny Jeehan Mohamed

doi:10.1016/j.saa.2024.124204

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

2024

DOI: 10.1016/j.saa.2024.124204

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Carbon dots-adorned silver nanoparticles as a straightforward sustainable colorimetric sensor for the rapid detection of ketotifen in eye drops and aqueous humor

Aya Magdy Saad,

Asmaa Kamal El-Deen,

Jenny Jeehan Mohamed Nasr

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2024

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Cited by 2 publications

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Utilizing an air-assisted liquid–liquid microextraction based on a natural hydrophobic deep eutectic solvent for the efficient determination of the anti-conjunctivitis olopatadine

Magdy Saad,

Jeehan Mohamed Nasr,

Kamal El-Deen

2024

Journal of Molecular Liquids

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Utilizing an air-assisted liquid–liquid microextraction based on a natural hydrophobic deep eutectic solvent for the efficient determination of the anti-conjunctivitis olopatadine

Magdy Saad,

Jeehan Mohamed Nasr,

Kamal El-Deen

2024

Journal of Molecular Liquids

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Fluorescent enhanced endogenous carbon dots derived from green tea residue for multiplex detection of heavy metal ions in food

Zhang,

Cai,

Liu

et al. 2024

Front. Sustain. Food Syst.

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IntroductionThe presence of excessive heavy metal content in food poses potential risks to human health.MethodsThis paper presents the fabrication of a novel type of Carbon Dots (CDs) using green tea residue as a carbon source, which can be applied for simultaneous detection of Hg2+, Pb2+, Fe3+, and Cu22+ through particle swarm optimization (PSO) based optimized variable-weighted least-squares support vector machine (VWLS-SVM) model and the partial least squares discriminant analysis (PLSDA) method.Results and DiscussionThe utilization of PSO-VWLS-SVM model discovered and verified two fluorescence enhancement markers of CDs, namely isoquercitrin and 5-methyl furfural in green tea residues. By employing PLSDA, simultaneous qualitative and quantitative determination of these four metal ions was achieved. These CDs are capable of detecting four types of metal ions at low concentrations even when there are high concentrations of other metal ions and amino acids. More importantly, the CDs were successfully applied for the detection of Hg2+, Pb2+, Fe3+, and Cu2+ in real food samples. The recovery rates of four metal ions spiked into five different matrices were found to be the range of 99.1–101.3%, while both intra-day and inter-day relative standard deviations remained below 0.5% for all samples. This study on chemometrics-assisted exploration into formation mechanisms of endogenous CDs provides theoretical guidance for enhancing their fluorescence properties and expanding their application in heavy metal detection in food.

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Carbon dots-adorned silver nanoparticles as a straightforward sustainable colorimetric sensor for the rapid detection of ketotifen in eye drops and aqueous humor

Cited by 2 publications

References 52 publications

Utilizing an air-assisted liquid–liquid microextraction based on a natural hydrophobic deep eutectic solvent for the efficient determination of the anti-conjunctivitis olopatadine

Utilizing an air-assisted liquid–liquid microextraction based on a natural hydrophobic deep eutectic solvent for the efficient determination of the anti-conjunctivitis olopatadine

Fluorescent enhanced endogenous carbon dots derived from green tea residue for multiplex detection of heavy metal ions in food

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