Chemometrically driven multiplexed metal ion detection using a triple emitting quantum dots-based nanoprobe

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

Castro, RC (Autor) Outra; Páscoa, RNMJ (Autor) Outra; Saraiva, MLMFS (Autor) Outra; Joao L M Santos (Autor) FFUP; Ribeiro, DSM (Autor) Outra

Revista

Título: Analytical and Bioanalytical Chemistry

Vol. 417

Páginas: 417-433

ISSN: 1618-2642

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-017-HJ4

DOI: 10.1007/s00216-024-05661-7

Abstract (EN): Metal ion pollution poses a global concern due to its significant risks to both human health and environmental well-being. The toxicity of these ions can increase when they coexist, interacting with each other and with other harmful substances, even at low concentrations. Therefore, an accurate, rapid, and cost-effective methodology is urgently needed for the simultaneous quantification of multiple metal ions. This study presents a new approach for the multiplexed detection of various metal ions (Ag+, Cu2+, Hg2+, Al3+, Pb2+, Fe3+, Fe2+, Zn2+, Ni2+, Cd2+, and Ca2+) using a triple-emission nanoprobe comprising carbon dots and distinctly capped CdTe quantum dots, specifically green-emitting glutathione -quantum dots and red-emitting 3-mercaptopropionic acid-quantum dots. The method achieved high accuracy by analysing first- and second-order photoluminescence data with distinct advanced chemometric tools. R2P values for partial least squares and unfolded partial least square models exceeding 0.9 for several metal ions at low concentrations (mmol L-1) were obtained. Additionally, PL second-order data yielded significantly better results than PL first-order data, attributed to the distinct behaviour of the metal ions over time. Interestingly, it was also noted for the first time the significant contribution of the molar ratio between the metal ions on the models' accuracy. This novel method provides a highly accurate and efficient way to detect multiple metal ions simultaneously, paving the way for improved environmental monitoring and pollution assessment. The utilization of the proposed method contributes to a better understanding of the complex interactions in mixed metal ion systems, allowing for earlier detection and mitigation of metal ion contamination threats.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 17