Determination of chloride by stripping chronopotentiometry with silver-film electrode

✍ Scribed by Zvonimir J. Suturović; Nikola J. Marjanović; Petar P. Dokić

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 328 KB
• Volume: 9
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/elan.1140090714

✦ Synopsis

The experimental parameters of cathodic stripping chronopotentiometry of chloride at a silver-film electrode are investigated and optimized. The chloride preconcentration is achieved in the form of silver chloride by a controlled potential oxidation of the working electrode under vigorous stimng. Cathodic stripping of the deposit is obtained by the constant current, under the condition of diffusive mass transfer. Deaeration of the solution is not necessary. A detection limit of 35 pg dm-? ( mol dm-3 ) is obtained at a deposition time of 180 s, with a reproducibility of 6.7 70 (expressed as relative standard deviation, RSD).