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The Impact of Storage Conditions on the Physicochemical Properties of Electrochemically Activated Solutions

https://doi.org/10.37442/fme.2024.3.57

Abstract

Introduction: Microbiological safety in food production is closely linked to the implementation of sanitary, hygienic, and anti-epidemic measures, where disinfectants play a critical role. The effectiveness of disinfectants largely depends on their stability and changes in physicochemical properties during storage. Existing literature highlights the insufficient study of the wetting properties of electrochemically activated solutions (ECAS) of anolytes in conjunction with traditionally analyzed characteristics such as active chlorine content, hydrogen ion activity (pH), and oxidation-reduction potential (ORP).

Purpose: To investigate the impact of storage conditions on the physicochemical properties of electrochemically activated neutral and acidic anolytes, including their wettability and stability.

Materials and Methods: The study objects were acidic and neutral electrochemically activated solutions obtained using electrolysis systems. The stability of anolyte solutions was evaluated based on active chlorine content, oxidation-reduction potential (ORP), and pH values. Wettability was assessed by the contact angle (CA) in a three-phase system using the Young-Laplace method.

Results: During the 70-day storage of acidic anolytes, ORP decreased compared to the initial solution, with the rate of decline depending on storage conditions and the most significant drop occurring in the initial days. For neutral anolyte samples, no significant ORP reduction was observed. However, samples stored in containers of different materials at a temperature of 5±1 ℃ showed a slight increase in ORP, which stabilized after 15–20 days. In neutral anolytes, the rate of active chlorine decrease was significantly lower than in acidic anolytes and correlated with pH reductions. This may be attributed to the formation of chlorine-containing acids in stored samples, shifting the solutions from neutral to acidic. The contact angle (CA) of anolytes on stainless steel surfaces after storage was comparable to the CA of a 0.1 N hydrochloric acid solution.

Conclusion: Storage conditions significantly influence the physicochemical and consumer properties of anolytes. Under different storage conditions, temperature is the most critical factor determining the stability of both acidic and neutral anolytes. Neutral anolytes are preferable for use and storage but require adherence to specific conditions. Neutral ECAS anolytes should be stored in closed glass, stainless steel, or enamel containers in a cool, dark place, away from heat sources and direct sunlight, at temperatures ranging from 0°C to +8°C, while following proper storage compatibility principles.

About the Authors

Boris V. Manevich
All-Russian Dairy Research Institute
Russian Federation


Evgeniy N. Titov
Russian State Social University
Russian Federation


Elena A. Burykina
All-Russian Dairy Research Institute
Russian Federation


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Supplementary files

Review

For citations:

Manevich B.V., Titov E.N., Burykina E.A. The Impact of Storage Conditions on the Physicochemical Properties of Electrochemically Activated Solutions. FOOD METAENGINEERING. 2024;2(3):41-53. (In Russ.) https://doi.org/10.37442/fme.2024.3.57

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