Chromofoams1 1 Patent pending qualitative and semi-quantitative tests with chromogenic organic reagents immobilized in plasticized open-cell polyurethane foams

T. Braun, A. B. Farag

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Polyurethane foams treated with organic reagents in a plasticizer solution can be used for simple, rapid, sensitive, and selective detection and semiquantitative determination of metal ions from dilute aqueous solutions. Batch techniques can be used for simple tests which provide sensitivity as good as, or better than, that attainable by normal spot tests. The application of reagent-treated foam columns for the detection and semiquantitative determination of metal ions from extremely dilute aqueous solutions is advantageous; ions in the p.p.b. range can be detected after passage of 1 l of solution at a fast rate. The use of these techniques for zinc(II) and lead(II) with dithizone, copper(II) with rubeanic acid, and cobalt(II) with thiocyanate-Amberlite LA-l, is described.

Original languageEnglish
Pages (from-to)301-309
Number of pages9
JournalAnalytica Chimica Acta
Volume73
Issue number2
DOIs
Publication statusPublished - 1974

Fingerprint

Chromogenics
foam
ion
Ions
aqueous solution
Metal ions
Dithizone
Metals
metal
Plasticizers
cobalt
Cobalt
zinc
copper
Foams
Zinc
Copper
acid
test
patent

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

Cite this

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abstract = "Polyurethane foams treated with organic reagents in a plasticizer solution can be used for simple, rapid, sensitive, and selective detection and semiquantitative determination of metal ions from dilute aqueous solutions. Batch techniques can be used for simple tests which provide sensitivity as good as, or better than, that attainable by normal spot tests. The application of reagent-treated foam columns for the detection and semiquantitative determination of metal ions from extremely dilute aqueous solutions is advantageous; ions in the p.p.b. range can be detected after passage of 1 l of solution at a fast rate. The use of these techniques for zinc(II) and lead(II) with dithizone, copper(II) with rubeanic acid, and cobalt(II) with thiocyanate-Amberlite LA-l, is described.",
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