Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10560916 | Talanta | 2005 | 6 Pages |
Abstract
Plasticized poly(vinyl chloride) (PVC) membranes of different compositions were tested for use in the construction of potentiometric flow detectors for triiodide. A membrane with a 2:1 (w/w) 2-nitrophenyl octyl ether to PVC ratio was selected. The influence of thiosulphate in the carrier solution composition and of the flow-injection variables on the determination of triiodide was studied. In the selected conditions, a linear relationship between peak height and log[I3â] was obtained between 5 à 10â6 and 1 à 10â4 mol lâ1 triiodide. Peak height relative standard deviations for 2 à 10â5 and 1 à 10â4 mol lâ1 triiodide were ±0.4 and ±1.8%, respectively, and sampling frequency was 80 samples per hour. The method proposed was applied satisfactorily to the iodometric determination of different chlorine-containing disinfectants, among them trichloroisocyanuric acid and dichloroisocyanurate in several types of commercial sample.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
JoaquÃn A. Ortuño, Concepción Sánchez-Pedreño, Jorge Hernández, Domingo J. Oliva,