A high-sensitivity photometric method based on doped Sol-Gel glass detectors: determination of sub-ppb divalent iron

Ovadia Lev*, Berta Iosefson Kuyavskaya, Ida Gigozin, Michael Ottolenghi, David Avnir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

A novel high-sensitivity photometric method to determine trace concentrations of water pollutants is presented. The Sol-Gel procedure, a simple and efficient way to produce porous glasses at room temperature, is applied to entrap organic reagents (e.g. 1,10-phenanthroline) in glass matrices without resorting to complicated covalent bonding procedures. When these doped Sol-Gel glass detectors are immersed in water they concentrate the analyte [e.g. iron(II)] from the solution into the glass matrix. The glass detectors may then be analyzed by a conventional spectrophotometer. Thus, exceedingly low concentrations can be determined, e.g., the demonstrated detection limit of ferrous ions in aqueous solution is below 100 ppt.

Original languageAmerican English
Pages (from-to)370-372
Number of pages3
JournalAnalytical and Bioanalytical Chemistry
Volume343
Issue number4
DOIs
StatePublished - Apr 1992

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