Reversible optical sensor for in situ determination of heavy metal impurities in the environment

Renata Reisfeld*, Dimitry Shamrakov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The method developed for reversible determination of cadmium ions is based on the incorporation of 8-hydroxyquinoline-5-sulfonic acid into silica films prepared by the sol-gel method. When exposed to a solution containing cadmium ions, a colored complex is formed. The concentration of the colored complex is determined from its characteristic absorption in the visible region using a special apparatus. The detection limit is of sub ppm order. This method can be used for the determination of various heavy metal ions.

Original languageEnglish
Pages (from-to)439-443
Number of pages5
JournalSensors and Materials
Volume8
Issue number7
StatePublished - 1996

Keywords

  • In situ determination of cadmium
  • Reversible optical sensor
  • Sol-gel optical sensor

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