Simple and rapid electrochemical quantification of water-stabilized HgSe nanoparticles of great concern in environmental studies
| Autor: | Alba Iglesias-Mayor, Jorge Ruiz Encinar, José M. Costa-Fernández, Olaya Amor-Gutiérrez, Diego Bouzas-Ramos, Agustín Costa-García, Alfredo de la Escosura-Muñiz |
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| Rok vydání: | 2019 |
| Předmět: |
Detection limit
Reproducibility 010401 analytical chemistry Inorganic chemistry Nanoparticle Electrochemical Techniques Mercury 02 engineering and technology 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry Selenium chemistry.chemical_compound Anodic stripping voltammetry chemistry Elemental analysis Colloidal gold Selenide Nanoparticles 0210 nano-technology Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Scopus RUO. Repositorio Institucional de la Universidad de Oviedo instname RUO: Repositorio Institucional de la Universidad de Oviedo Universidad de Oviedo (UNIOVI) |
| ISSN: | 0039-9140 |
| DOI: | 10.1016/j.talanta.2019.03.038 |
| Popis: | The sensitive monitoring of mercury (II) selenide nanoparticles (HgSe NPs) is of great potential relevance in environmental studies, since such NPs are believed to be the ultimate metabolic product of the lifesaving mechanism pathway of Hg detoxification in biological systems. In this context, we take advantage of using gold-nanostructured screen-printed carbon electrodes (SPCE-Au) for the rapid, simple and sensitive electrochemical quantification of engineered water-stable HgSe NPs, as an advantageous alternative to conventional elemental analysis techniques. HgSe NPs are first treated in an optimized oxidative/acidic medium for Hg2+ release, followed by sensitive electrochemical detection by anodic stripping voltammetry (ASV). To the best of our knowledge, this is the first time that water-stable HgSe NPs are quantified using electrochemical techniques. The low limit of detection achieved (3.86 × 107 HgSe NPs/mL) together with the excellent repeatability (RSD: 3%), reproducibility (RSD: 5%) and trueness (relative error: 10%), the good performance in real sea water samples (recoveries of the analytical signal higher than 90%) and the simplicity/low cost of analysis make our method an ideal candidate for HgSe NPs monitoring in future environmental studies. |
| Databáze: | OpenAIRE |
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