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Ultrasensitive green spectrofluorimetric approach for quantification of Hg(II) in environmental samples (water and fish samples) using cysteine@MnO2 dots.
Salman, Baher I; Hassan, Yasser F; Ali, Marwa F B; Batakoushy, Hany A.
Afiliação
  • Salman BI; Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut branch, Assiut, Egypt.
  • Hassan YF; Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut branch, Assiut, Egypt.
  • Ali MFB; Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
  • Batakoushy HA; Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Menoufia University, Shebin Elkom, Egypt.
Luminescence ; 38(2): 145-151, 2023 Feb.
Article em En | MEDLINE | ID: mdl-36579943
Mercury (Hg2+ ) is a natural element present in foods such as fish, water and soil. Exposure to mercury leads to severe toxic effects on the nervous, digestive, and immune systems. Here, a novel, green, and environmentally friendly fluorescent probe decorated with cysteine/MnO2 quantum dots (Cys@MnO2 QDs) was synthesized. This synthesis was carried out using a simple ultrasound technique with the aid of cysteine for fabricating Cys@MnO2 QDs to estimate Hg levels in fish and water samples. In this morphological study, Cys@MnO2 QDs were fully characterized using high-resolution transmission electron microscopy, zeta potential analysis, fluorescence, ultraviolet-visible and infrared spectroscopy. The fluorescence of the synthesized Cys@MnO2 QDs was significantly quenched by gradually increasing the Hg(II) concentration. The quenching mechanism based on the Hg-S bonds strengthened the utility of the Cys@MnO2 QDs as a novel luminescent nanoprobe. The estimation of Hg was linear in the concentration range 0.7-100.0 ng mL-1 with a limit of quantitation equal to 0.30 ng mL-1 . The Cys@MnO2 QDs are fluorescent probes with various benefits such as speed, ease of use, cost- effective, and being environmentally friendly; they are easily applied in food manufacturing and for public health improvement.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Pontos Quânticos / Mercúrio Limite: Animals Idioma: En Revista: Luminescence Assunto da revista: BIOFISICA / BIOQUIMICA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Egito

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Pontos Quânticos / Mercúrio Limite: Animals Idioma: En Revista: Luminescence Assunto da revista: BIOFISICA / BIOQUIMICA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Egito