Heavy metal ion detection on a microspot electrode using an optical electrochemical probe

Santanu Roy, Abhijeet Prasad, Rahul Tevatia, Ravi F. Saraf

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Electrochemical sensors can be used to create portable, attractive, high-sensitivity devices to detect heavy ions in water at a reasonable cost. A novel method of measuring local redox on an electrode using the differential reflectivity measured on an approximately 6 micron diameter spot using a He/Ne laser beam is described. Field focusing and electrode modification enhance the sensitivity, making the method ideal for miniaturization and multiplexing multiple analytes on a monolith electrode. The method is demonstrated by detecting Pb, Hg, and As ions at ppb and ppt levels.

Original languageEnglish (US)
Pages (from-to)94-98
Number of pages5
JournalElectrochemistry Communications
Volume86
DOIs
StatePublished - Jan 2018

Keywords

  • Dielectrophoretic effect
  • Electro-optics
  • Electrochemical analysis
  • Electrode size
  • Heavy metals
  • Water pollution

ASJC Scopus subject areas

  • Electrochemistry

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