Accession Number : ADA140823

Title :   Luminescence Titrations of Polyelectrolytes.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS A AND M UNIV COLLEGE STATION DEPT OF CHEMISTRY

Personal Author(s) : Alvarez-Roa,E R ; Prieto,N E ; Martin,C R

PDF Url : ADA140823

Report Date : 01 May 1984

Pagination or Media Count : 34

Abstract : When an anionic polyelectrolyte is added to a solution of a cationic lumophore (the probe), binding of the probe ions to the anionic sites on the polymer chain can occur. We have found that in some cases, this binding results in an increase in the probe's quantum yield for emission. This paper explores the possibility of exploiting this effect in luminescence titrations for determination of either the equivalent weight (EW) of a polyanion or the concentration of the polyanion in solution (if the EW is known). A suitable probe cation is identified and luminescence titration curves for a variety of polyanions are presented. The luminescence titration procedure was found to produce precisions of better than 5% and accuracies of better than 1% in titrations of the Na(+) salt forms of hydrophobic polyanions. (Author)

Descriptors :   *Polyelectrolytes, *Luminescence, *Titration, *Analytical chemistry, Anions, Addition, Solutions(Mixtures), Cations, Probes, Ion ion interactions, Polymers, Quantum chemistry, Yield, Emission, Weight, Concentration(Chemistry), Sodium compounds, Salts, Hydrophobic properties

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE