Dual modes of fluorescence sensing and smartphone readout for sensitive and visual detection of mercury ions in Porphyra.
Anal Chim Acta
; 1226: 340153, 2022 Sep 15.
Article
em En
| MEDLINE
| ID: mdl-36068047
ABSTRACT
A convenient and intuitive method for detecting trace heavy metal ions is vital for food safety and quality monitoring. Herein, a dual-emission ratiometric fluorescence probe based on Zr-based metal-organic frameworks (Zr-MOF) and silver nanoclusters (AgNCs) was assembled to sensitive and visual detect mercury ions (Hg2+). The sensor exhibits good sensitivity from 0.010 to 0.5 µg mL-1 with a low detection limit of 1.8 µg L-1 (corresponding to 0.72 µg kg-1 by weight). The proposed method was finally applied to determine Hg2+ in the Porphyra matrix with satisfactory outcomes, the analytical recoveries were in the range of 94.74%-101.1%, indicating the practicability of the developed method. Meanwhile, the smartphone-based colorimetric method was established by capturing the changes in fluorescence colors of the probes exposed to different Hg2+ concentrations, with a quick sample-to-answer monitoring time of 10 min. The fluorescence probe, with these merits of simplicity, rapid response, and high sensitivity, offered a promising means for evaluating the safety of food polluted with Hg2+.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Porphyra
/
Mercúrio
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article