Construction,analytical study and application of a new chloramine-t selective electrode |
| |
Authors: | M.A. Koupparis T.P. Hadjiioannou |
| |
Affiliation: | Laboratory of Analytical Chemistry, University of Athens, AthensGreece |
| |
Abstract: | A chloramine-T (CAT) selective electrode with a liquid membrane of nickel batho-phenanthroline—chloramine-T dissolved in 2-nitro-p-cymene is described. The liquid membrane electrode exhibits rapid and near Nernstian response to chloramine-T activity from 10-1 to 10-4 M. The response is unaffected by pH in the range 5–9. Major interferences are penodate and perchlorate. In analytical applications, direct potentiometnc methods for the determination of chloramme-T, ascorbic acid, and arsenic(III), and a titnmetric method for ascorbic acid are described. Ascorbic acid and arsenic(IU) in the ranges 0.4–40 and 0.5–2 mg, respectively, can be determined with relative errors of 1–2%. The method has been applied to the determination of ascorbic acid in pharmaceutical preparations. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|