Potentiometric Determination of Silver Nanoparticles using Silver Amalgam Electrodes
| Autor: | Renata Petrankova, Ladislav Novotný |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Potenciometrie
Clinical Biochemistry Potentiometric titration Inorganic chemistry Analytical chemistry Nanoparticle stříbrné amalgamové elektrody 02 engineering and technology 01 natural sciences Biochemistry Silver nanoparticle Analytical Chemistry chemistry.chemical_compound symbols.namesake Electrochemistry Nernst equation silver amalgam electrodes Spectroscopy Aqueous solution 010401 analytical chemistry Biochemistry (medical) silver colloid nanoparticles 021001 nanoscience & nanotechnology 0104 chemical sciences Silver nitrate chemistry Electrode Potentiometry symbols stříbrné koloidní nanočástice Amalgam (chemistry) 0210 nano-technology |
| Zdroj: | Analytical Letters. 49:161-168 |
| ISSN: | 1532-236X 0003-2719 |
| DOI: | 10.1080/00032719.2015.1045584 |
| Popis: | A new approach to potentiometric measurements using an advanced amalgam electrode is reported. The conditions for the potentiometric determination on silver solid amalgam electrodes to determine total silver as colloidal silver nanoparticles are described. Proper calibration procedure was demonstrated by the potential and logarithmic concentration dependence at the silver amalgam and reference silver disc electrodes for aqueous silver nitrate, as both electrodes conformed to the Nernst equation with the slopes of approximately +58 mV. However, analogous measurements using the silver solid amalgam electrode of silver nanocolloidal solutions provided a slope of −43 mV. Although this value did not match the theoretical result for the Nernst equation, the device allowed the determination of total silver in these solutions. Under the same conditions, no useful calibration dependence was obtained using the silver electrode for the silver colloids. |
| Databáze: | OpenAIRE |
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