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Organically-doped sol—gel based tube detectors: Determination of iron(II) in aqueous solutions

Authors
Journal
Talanta
0039-9140
Publisher
Elsevier
Publication Date
Volume
40
Issue
5
Identifiers
DOI: 10.1016/0039-9140(93)80290-8
Disciplines
  • Chemistry

Abstract

Abstract A novel type of disposable sensor for the determination of iron(II) in aqueous solution is described. The iron sensor serves to exemplify a new class of disposable field tests for field analysis of water pollutants. The sensors are comprised of capillary glass tubes filled with porous sol—gel silica powder doped with o-phenanthroline. When a sample solution is passed through a tube detector the iron ions are complexed by the immobilized o-phenanthroline and a stained section of the capillary develops. Metrological characteristics of these detectors including precision and accuracy and chemical interferences by heavy metals and humic acids are discussed.

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