Bioinspired gold nanoparticles-based colorimetric nanosensor for detection of antimony in plastic bottled water

It is reported that antimony (Sb), a toxic metal classified as potentially carcinogenic, migrates from plastic bottles into bottled water. Here, bioinspired colorimetric sensor based on green synthesized gold nanoparticles (AuNPs) using unchewable part of Khat leaf ( Garaba ) extracts were developed...

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Bibliographic Details
Published in:Research on chemical intermediates 2023-07, Vol.49 (7), p.3227-3244
Main Authors: Refera, Berhanu, Bekana, Deribachew, Temesgen, Ayalew, Teju, Endale, Jabessa, Abdisa
Format: Article
Language:English
Subjects:
Antimony
Bottled water
Carcinogens
Catalysis
Chemistry
Chemistry and Materials Science
Colorimetry
Gold
Inorganic Chemistry
Nanoparticles
Nanosensors
Optimization
Parameter sensitivity
Particle size
Physical Chemistry
Room temperature
Target detection
Water sampling
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Summary:It is reported that antimony (Sb), a toxic metal classified as potentially carcinogenic, migrates from plastic bottles into bottled water. Here, bioinspired colorimetric sensor based on green synthesized gold nanoparticles (AuNPs) using unchewable part of Khat leaf ( Garaba ) extracts were developed for the detection of Sb 3+ in bottled water. The AuNPs were successfully synthesized by optimization of different conditions such as leaf extract volume of 0.25 mL, a precursor concentration of 1 mM HAuCl 4 .3H 2 O, a reaction temperature of 60 °C, and a reaction time of 30 min. The as-synthesized AuNPs feature a spherical shape and monodisperse particle size with an average particle size of 12.4 nm. A bioinspired colorimetric sensor was developed using thioglycolic acid functionalized AuNPs and Sb 3+ induced AuNPs aggregation, resulting in a new absorption peak at 660 nm after optimization of parameters affecting colorimetric assays. The method demonstrated high sensitivity for the detection of Sb 3+ ions with a detection limit of 2.07 µg/L under optimized conditions and good selectivity in the presence of potential interfering ions. The practicability of the proposed method was studied by investigating the release of Sb 3+ from three bottled water samples after storage at room temperature and 40 °C. The concentration of Sb 3+ released into bottled water was found to be below the limit of detection for three brands of bottled water samples. The proposed method is advantageous due to its ease of use, high sensitivity, environmental friendliness, and quick detection of the target analyte.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-023-05037-z