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A ratiometric fluorescence and colorimetry dual-signal sensing strategy based on o-phenylenediamine and AuNCs for determination of Cu2+ and glyphosate.
Li, Ziqiang; Liang, Shuang; Zhang, Changsheng; Zhou, Li; Luo, Fengjian; Lou, Zhengyun; Chen, Zongmao; Zhang, Xinzhong; Yang, Mei.
Afiliación
  • Li Z; Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China.
  • Liang S; Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China.
  • Zhang C; College of Plant Protection, Jilin Agricultural University, Jilin, 130000, China.
  • Zhou L; Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China.
  • Luo F; Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China.
  • Lou Z; College of Plant Protection, Jilin Agricultural University, Jilin, 130000, China.
  • Chen Z; Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China.
  • Zhang X; Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China.
  • Yang M; Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China.
Mikrochim Acta ; 191(7): 423, 2024 06 26.
Article en En | MEDLINE | ID: mdl-38922503
ABSTRACT
A ratiometric fluorescence sensing strategy has been developed for the determination of Cu2+ and glyphosate with high sensitivity and specificity based on OPD (o-phenylenediamine) and glutathione-stabilized gold nanoclusters (GSH-AuNCs). Water-soluble 1.75-nm size GSH-AuNCs with strong red fluorescence and maximum emission wavelength at 682 nm were synthesized using GSH as the template. OPD was oxidized by Cu2+, which produced the bright yellow fluorescence oxidation product 2,3-diaminophenazine (DAP) with a maximum fluorescence emission peak at 570 nm. When glyphosate existed in the system, the chelation between glyphosate and Cu2+ hindered the formation of DAP and reduced the fluorescence intensity of the system at the wavelength of 570 nm. Meanwhile, the fluorescence intensity at the wavelength of 682 nm remained basically stable. It exhibited a good linear relationship towards Cu2+ and glyphosate in water in the range 1.0-10 µM and 0.050-3.0 µg/mL with a detection limit of 0.547 µM and 0.0028 µg/mL, respectively. The method was also used for the semi-quantitative determination of Cu2+ and glyphosate in water by fluorescence color changes visually detected by the naked eyes in the range 1.0-10 µM and 0.30-3.0 µg/mL, respectively. The sensing strategy showed higher sensitivity, more obvious color changes, and better disturbance performance, satisfying with the detection demands of Cu2+ and glyphosate in environmental water samples. The study provides a reliable detection strategy in the environment safety fields.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fenilendiaminas / Espectrometría de Fluorescencia / Contaminantes Químicos del Agua / Colorimetría / Cobre / Nanopartículas del Metal / Límite de Detección / Glifosato / Glicina / Oro Idioma: En Revista: Mikrochim Acta Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Austria
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fenilendiaminas / Espectrometría de Fluorescencia / Contaminantes Químicos del Agua / Colorimetría / Cobre / Nanopartículas del Metal / Límite de Detección / Glifosato / Glicina / Oro Idioma: En Revista: Mikrochim Acta Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Austria