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Updated: Jun 28, 2026

Synthesis and Purification of Iodoaziridines Involving Quantitative Selection of the Optimal Stationary Phase for Chromatography
Published on: May 16, 2014
Flow injection determination of iodide ion in a photographic developing solution using iodide ion-selective electrode
T Masadome1, R Sonoda, Y Asano
1Department of Chemical Science and Engineering, Ariake National College of Technology, Omuta, Fukuoka 836-8585, Japan.
A new potentiometric method accurately determines iodide ion concentration in photographic developing solutions using an iodide ion-selective electrode. This technique offers reliable analysis even with complex sample matrices.
Area of Science:
- Analytical Chemistry
- Electrochemistry
Background:
- Photographic developing solutions require precise chemical analysis.
- Accurate determination of iodide ion concentration is crucial for process control.
Purpose of the Study:
- To develop a potentiometric flow injection determination method for iodide ions.
- To utilize a flow-through type iodide ion-selective electrode for analysis.
Main Methods:
- Employing a silver sulfide-silver iodide (Ag(2)S-AgI) sensing membrane.
- Utilizing a flow injection analysis (FIA) system with an iodide ion-selective electrode detector.
- Measuring peak height response correlated with iodide ion concentration.
Main Results:
- A linear relationship was observed between peak height and iodide ion concentration (0-6.0x10(-5) mol L(-1)) in the sub-Nernstian zone.
- High precision was achieved with a relative standard deviation of 0.96% for 2x10(-5) mol L(-1) iodide ion.
- A sampling rate of 12-13 samples per hour was attained.
- The method demonstrated robustness in the presence of organic reducing agents and high concentrations of inorganic electrolytes.
Conclusions:
- The developed potentiometric flow injection method is effective for determining iodide ions in photographic developing solutions.
- The method is accurate, precise, and suitable for complex sample matrices.
- This technique provides a reliable analytical tool for photographic process control.
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