Detection of heavy metals in water using dye nano-complexants and a polymeric film

Hodayah Abuhatzira Hadar, Valery Bulatov, Bella Dolgin, Israel Schechter*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


An optical analytical method, based on complexation reactions of organic azo-dyes with heavy metals, is proposed. It is based on a specially designed polymeric film that when submerged in water contaminated with heavy metals it changes its color. The azo-dyes are injected into the tested water, resulting in formation of nano-particles of insoluble complexes. The polymeric film embeds and dissolves these nano-particles and thus allows for spectral and/or visual analysis. This film consists of a PVC polymeric skeleton and an organic solvent, bis(2-ethylhexyl)phthalate, which possesses high affinity to the heavy metal nano-complexes. The method was exemplified for Cd, Ni and Co ions. The method is sensitive in the sub-ppm range. The mechanism and kinetics of the film coloration were reported.

Original languageEnglish
Pages (from-to)652-659
Number of pages8
JournalJournal of Hazardous Materials
StatePublished - 15 Sep 2013
Externally publishedYes


  • Analysis
  • Complexation
  • Heavy metals
  • Polymeric film
  • Strip test


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