Continuous Electrochemical Detection of Gold Nanoparticles in Flow
| Autor: | T. Andryszewski, Marcin Opallo, Dominika Ogończyk, M. Gocyla |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Flow injection analysis
Aqueous solution Materials science Passivation Nanoparticle Nanotechnology 02 engineering and technology Electrochemical detection 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences 0104 chemical sciences Analytical Chemistry Suspension (chemistry) Colloidal gold Electrochemistry 0210 nano-technology |
| Zdroj: | Electroanalysis. 29:1934-1940 |
| ISSN: | 1040-0397 |
| Popis: | Nanoparticles have already found numerous applications and their global production is still increasing. Therefore, the engineered nanoobjects of uncertain toxicity become ubiquitous in the environment and a continuous monitoring of their presence is highly desirable. Here, we demonstrate a continuous electrochemical detection of gold nanoparticles (AuNPs) based on synchronous processes of their electrodissolution and electrocatalysis. This approach is realized by the injection of nanoparticles suspension into the Flow Injection Analysis (FIA) system. The modular structure of FIA system is particularly applicable for carrying out of sequential operations: AuNPs passivation, oxidation of aqueous SO2 and gold. It enables continuous, fast and reproducible gold nanoparticles determination in a wide concentration range: 10−10– 10−7 mol nanoobjects L−1. |
| Databáze: | OpenAIRE |
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