Sampling for silver nanoparticles in aqueous media using a rotating disk electrode: evidence for selective sampling of silver nanoparticles in the presence of ionic silver
| Autor: | Wayne Sovocool, Brian Schumacher, Vernon F. Hodge, Spencer M. Steinberg |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Silver Stripping (chemistry) Inorganic chemistry Nanoparticle Metal Nanoparticles 02 engineering and technology Management Monitoring Policy and Law 010402 general chemistry 01 natural sciences Silver nanoparticle Electrochemistry Rotating disk electrode Organic Chemicals Voltammetry Electrodes General Environmental Science Ions Aqueous solution Temperature Water General Medicine 021001 nanoscience & nanotechnology Pollution Carbon 0104 chemical sciences Carbon paste electrode Anodic stripping voltammetry Graphite Adsorption 0210 nano-technology Environmental Monitoring |
| Zdroj: | Environmental monitoring and assessment. 189(3) |
| ISSN: | 1573-2959 |
| Popis: | Amendment of a carbon paste electrode consisting of graphite and Nujol®, with a variety of organic and inorganic materials, allows direct adsorption of silver nanoparticles (AgNPs) from aqueous solution in either open or close circuit modes. The adsorbed AgNPs are detected by stripping voltammetry. Detection limits of less than 1 ppb Ag are achievable with a rotating disk system. More than one silver peak was apparent in many of the stripping voltammograms. The appearance of multiple peaks could be due to different species of silver formed upon stripping or variation in the state of aggregation or size of nanoparticles. With most of these packing materials, dissolved Ag+ was also extracted from aqueous solution, but, with a packing material made with Fe(II,III) oxide nanoparticles, only AgNPs were extracted. Therefore, it is the best candidate for determination of metallic AgNPs in aqueous environmental samples without interference from Ag+. |
| Databáze: | OpenAIRE |
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