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[The formation of iodate as a reason for the decrease of efficiency of iodine containing disinfectants (author's
Zentralblatt Fur Bakteriologie, Mikrobiologie Und Hygiene. 1. Abt. Originale B, Hygiene
|January 1, 1981
Summary
Iodine disinfectants remain effective below pH 6. Above pH 7, stability depends on pH and iodide concentration, with higher iodide improving stability for practical use.
Area of Science:
- Analytical Chemistry
- Physical Chemistry
Context:
- Iodine-based disinfectants are widely used.
- Understanding their stability is crucial for efficacy.
- Iodate formation can impact disinfectant performance.
Purpose:
- To determine iodate equilibrium concentrations in aqueous iodine solutions.
- To calculate reaction times for iodine to iodate transformation.
- To assess the stability of iodine-containing disinfecting agents under varying conditions.
Summary:
- Methods were developed to calculate iodate equilibrium concentrations and reaction times for iodine-to-iodate transformation.
- Evaluated solutions of triiodide and iodine with varying iodide concentrations.
- Found that below pH 6, iodate formation is negligible. Above pH 7, iodate formation is highly dependent on pH and iodide concentration, with higher pH decreasing stability and higher iodide increasing it.
Impact:
- Below pH 6, disinfectant effectiveness is not compromised by iodate formation.
- Above pH 7, careful consideration of pH and iodide concentration is necessary for stability.
- Sufficient iodide concentrations can stabilize iodine disinfectants even in the weakly alkaline range (pH < 9).