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
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Fixing solution

Citations 4

"Spectrophotometric Determination Of Silver With 4-(3,5-dibromo-2-pyridylazo)-NN-diethylaniline In The Presence Of Sodium Dodecyl Sulfate"
Anal. Chim. Acta 1986 Volume 182, Issue 1 Pages 157-162
K. Ohshita, H. Wada and G. Nakasawa

Abstract: The cited aniline derivative (I) reacted with Ag+ to form the AgI2 chelate in the presence of anionic or non-ionic surfactants. The e value at 600 nm was 80,000 in 0.1% Na dodecyl sulfate (II) solution A bathochromic shift was observed on addition of the surfactant. A method was developed for the spectrophotometric determination of 0.1 to 1.0 mg L-1 of Ag. Thus, the sample was mixed with EDTA solution, II, acetic acid - Na acetate buffer (pH 5.5) and I in ethanol, and the absorbance was measured at 600 nm. A flow injection method based on use of I and II was used to determine Ag in waste photographic fixing solution, pre-treatment of which is described.
Silver(I) Spectrophotometry Chelation Micelle

"Indirect Potentiometric Flow Injection Determination Of Silver In Photographic Fixing Solutions"
Anal. Chim. Acta 1989 Volume 220, Issue 1 Pages 287-291
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 Potentiometry Electrode Diffusion Microporous membrane Goretex Method comparison Indirect

"Flow Injection Determination Of Oxidants With Leuco-thionine Blue"
Analyst 1988 Volume 113, Issue 7 Pages 1057-1060
armen Martinez-Lozano, Tomás Pérez-Ruiz, Virginia Tomás and Encarnación Yagüe

Abstract: Sample solution (85 µL) is injected into the flow injection system and mixed with leuco-thionine blue solution [prepared by irradiation of thionine blue (C. I. Basic Blue 25) in aqueous EDTA] and buffer solution (pH 4.5 to 5.5) in a reaction coil (100 cm). Flow rates of all solution are 0.74 mL min-1. The absorbance of the solution is measured at 670 nm. Results for determination of IO4-, Cr(VI), Fe(CN)63- and V(V) are presented. Limits of determination ranged from 48 to 0.108 µM. The method was applied in the determination of Cr and V in steels, V in petroleum products and Fe(CN)63- in photographic solution, and in the separation of Cr(VI) - Cr(III) mixtures.
Periodate Chromate Vanadium(V) Ferricyanide Spectrophotometry Redox

"Flow Injection Type Electrogravimetric Analysis System Incorporated With Quartz Crystal Micro-balance Method"
Bunseki Kagaku 1993 Volume 42, Issue 7 Pages T93-T98
Ninomiya, Y.;Oda, S.;Oyama, N.

Abstract: A new electrogravimetric system was developed in which the quartz crystal resonator (QSR), located in the flow-through electrolysis cell as a micro-balance, also acts as a working electrode for electrolysis. Sample solution was injected into the carrier stream and the amount of metal in the solution was measured from the frequency change of the QSR, caused by electrodeposition of metal. The method was applied to the determination of Ag in photographic fixative solution Results agreed with those from ICP-AES analysis; the coefficient of variation (n = 12) for Ag was 3.6%.
Silver Electrogravimetry Microbalance Method comparison