Fluorimetric Kinetic-FIA Determination of Ag(I) Based on Its Catalytic Effect on the Reduction Reaction of Safranine with Iodide

✍ Scribed by A. Safavi; M.R. Baezzat

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 93 KB
• Volume: 58
• Category: Article
• ISSN: 0026-265X
• DOI: 10.1006/mchj.1997.1533

✦ Synopsis

A sensitive kinetic fluorimetric flow injection method has been developed for the determination of Ag(I) over the range 100-2500 ng. The method is based on the catalytic effect of Ag(I) on the reduction reaction of safranine by iodide. Method development includes optimization of reagent concentration, pH, reaction temperature, and flow variables. The optimized flow injection manifold yielded a detection limit of 50 ng of Ag(I). Chemical interference studies showed that the method also has good selectivity. The method was applied to the determination of silver in expired black and white photographic film.