(2023) Elucidation of composition of chlorine compounds in acidic sodium chlorite solution using ion chromatography. Although there are still many problems to be solved, we believe that the use of IC will facilitate the elucidation of the composition of sodium chlorite solution and its sterilization mechanism.Ĭitation: Kishimoto A, Ohtsubo R, Okada Y, Sugiyama K, Goda H, Yoshikawa T, et al. Sodium hypochlorite and sodium chlorite solutions have completely different IC peak profiles. ![]() In summary, when a sodium chlorite solution becomes acidic, chlorine-based oxidizing species produce an absorption peak at 365 nm. These results indicate that chlorite ions may not react with this DPD reagent, and other oxidizing species may be present in the acidic sodium chlorite solution. On the other hand, the IC analysis showed a gradual decrease in chlorite ions in the acidic sodium chlorite solution. The presence of a peak at 365 nm indicates that the acidic sodium chlorite solution contains species with oxidizing power. Sodium chlorite solution is normally alkaline, and it cannot be measured by the DPD method, which is only applicable under acidic conditions. In addition, when sodium chlorite solution became acidified, its absorption spectrum exhibited a peak at 365 nm. We found that commercially available sodium chlorite solution is 80% pure, with the remaining 20% potentially containing sodium hypochlorite solution. Through this, we aimed to develop an evaluation method that allows anyone to easily determine the bactericidal power of sodium chlorite. IC is excellent for qualitative and quantitative analysis of trace ions. In this study, we attempted to elucidate the composition of a sodium chlorite solution using absorption spectrophotometry and ion chromatography (IC). In addition, the conventional iodometric titration method, the N, N-diethyl- p-phenylenediamine sulfate (DPD) method and the absorption photometric method cannot clarify the composition. ![]() The composition can vary greatly with pH. One reason for this is that the composition of chlorine-based compounds contained in sodium chlorite solutions has not been clearly elucidated. There is evidence that chlorous acid or sodium chlorite is effective against various bacteria, but the actual mechanism is not well understood. ![]() Sodium chlorite solution is a food additive and is used in a wide range of applications. With the spread of coronavirus infections, the demand for disinfectants, such as a sodium chlorite solution, has increased worldwide.
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