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Portable ratiometric fluorescence detection of Cu2+and thiram.
Zhang, Jiazhen; Jia, Yicong; Tong, Xuan; Zhou, Hangyu; Zhang, Le; Yang, Yue; Ji, Xu.
Afiliación
  • Zhang J; School of Physical and Electronic Information, Yunnan Normal University, Kunming, 650500, People's Republic of China.
  • Jia Y; School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, People's Republic of China.
  • Tong X; School of Physical and Electronic Information, Yunnan Normal University, Kunming, 650500, People's Republic of China.
  • Zhou H; School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, People's Republic of China.
  • Zhang L; School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, People's Republic of China.
  • Yang Y; School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, People's Republic of China.
  • Ji X; Education Ministry Key Laboratory of Renewable Energy Advanced Materials and Manufacturing Technology, Yunnan Normal University, Kunmsing 650500, People's Republic of China.
Methods Appl Fluoresc ; 12(3)2024 Apr 05.
Article en En | MEDLINE | ID: mdl-38587171
ABSTRACT
Food contaminants pose a danger to human health, but rapid, sensitive and reliable food safety detection methods can offer a solution to this problem. In this study, an optical fiber ratiometric fluorescence sensing system based on carbon dots (CDs) and o-phenylenediamine (OPD) was constructed. The ratiometric fluorescence response of Cu2+and thiram was carried out by the fluorescence resonance energy transfer (FRET) between CDs and 2,3-diaminophenazine (ox-OPD, oxidized state o-phenylenediamine). The oxidation of OPD by Cu2+resulted in the formation of ox-OPD, which quenched the fluorescence of CDs and exhibited a new emission peak at 573 nm. The formation of a [dithiocarbamate-Cu2+] (DTC-Cu2+) complex by reacting thiram with Cu2+, inhibits the OPD oxidation reaction triggered by Cu2+, thus turning off the fluorescence signal of OPD-Cu2+. The as-established detection system presented excellent sensitivity and selectivity for the detection of Cu2+and thiram in the ranges of 1 ∼ 100µM and 5 ∼ 50µM, respectively. The lowest detection limits were 0.392µM for Cu2+and 0.522µM for thiram. Furthermore, actual sample analysis indicated that the sensor had the potential for Cu2+and thiram assays in real sample analysis.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Methods Appl Fluoresc Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Methods Appl Fluoresc Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido