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Developing potentiometric sensors for scandium

Dehabadi, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.snb.2021.130699
  3. Publisher: Elsevier B.V , 2021
  4. Abstract:
  5. Scandium is a rare earth element that is not very abundant on Earth, however in recent years due to the employment of scandium in various high-tech fields the interest in the analytical chemistry of this metal is growing. Currently, the methods for scandium quantification are mainly based on inductively coupled plasma atomic emission and mass-spectrometry and to the best of our knowledge no potentiometric sensors for scandium detection were reported so far. This study is devoted to the development of simple and cost-effective ion-selective sensors for quantification of Sc3+ in aqueous media. Employing the variety of lipophilic ligands suggested in liquid extraction for separation of lanthanides and actinides we synthesized a series of plasticized polymeric sensor membranes that have shown pronounced sensitivity to Sc3+ in acidic aqueous solutions, reaching in some cases super-Nernstian values around 30 mV/dec. The selectivity of the sensors was studied with respect to transition metals, lanthanides and yttrium and it was found that most of the developed sensors are selective towards scandium. The real-life applicability of the sensors was demonstrated in quantification of scandium in industrial solutions – hydrolytic sulfuric acid obtained from pigment titanium dioxide production. We believe these sensors can be considered as a promising alternative to conventional analytical methods in technological process monitoring task. © 2021 Elsevier B.V
  6. Keywords:
  7. Chemical analysis ; Cost effectiveness ; Inductively coupled plasma ; Mass spectrometry ; Potentiometers (electric measuring instruments) ; Potentiometric sensors ; Process monitoring ; Rare earths ; Scandium ; Titanium dioxide ; Aqueous media ; Atomic emission and mass spectrometries ; Cost effective ; High tech ; Ion selective sensors ; Liquid extraction ; Rare earth metals ; Rare-earth metals ; Simple++ ; Synthesised ; Rare earth elements
  8. Source: Sensors and Actuators B: Chemical ; Volume 348 , 2021 ; 09254005 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925400521012673