University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Electrode

Classification: Electrode -> silver/silver sulfide

Citations 1

"Indirect Potentiometric Flow Injection Determination Of Silver In Photographic Fixing Solutions"
Anal. Chim. Acta 1989 Volume 220, Issue 1 Pages 287-291

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Frazier Nyasulu

Abstract: Sample (0.4 ml) is injected into a stream of water that merges with a stream of 2 M H2SO4 at 70°C, and the SO2 produced is removed by diffusion through a 75-cm coil of Gore-Tex microporous PTFE tubing (pore size 3.5 µm). An excess of S2- in 6 M NaOH is added downstream of the coil, and the decrease in S2- concentration. is measured with a Ag - Ag2S electrode. The calibration graph is rectilinear from 1 mg L-1 to 10 g L-1 of Ag, and the detection limit is 0.04 mg l-1. Results for five fixing solution agreed well with those obtained by AAS.
Silver Fixing solution Diffusion Microporous membrane Goretex Method comparison Indirect