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The effect of long-term storage on the physiochemical and bactericidal properties of electrochemically activated solutions

Robinson, Gareth; Thorn, Robin; Reynolds, Darren

The effect of long-term storage on the physiochemical and bactericidal properties of electrochemically activated solutions Thumbnail


Authors

Gareth Robinson Gareth2.Robinson@uwe.ac.uk
Associate Director (Partnerships & Planning)

Dr Robin Thorn Robin2.Thorn@uwe.ac.uk
Director of Research and Enterprise



Abstract

Electrochemically activated solutions (ECAS) are generated by electrolysis of NaCl solutions, and demonstrate broad spectrum antimicrobial activity and high environmental compatibility. The biocidal efficacy of ECAS at the point of production is widely reported in the literature, as are its credentials as a "green biocide." Acidic ECAS are considered most effective as biocides at the point of production and ill suited for extended storage. Acidic ECAS samples were stored at 4 °C and 20 °C in glass and polystyrene containers for 398 days, and tested for free chlorine, pH, ORP and bactericidal activity throughout. ORP and free chlorine (mg/L) in stored ECAS declined over time, declining at the fastest rate when stored at 20 °C in polystyrene and at the slowest rate when stored at 4 °C in glass. Bactericidal efficacy was also affected by storage and ECAS failed to produce a 5 log10 reduction on five occasions when stored at 20 °C. pH remained stable throughout the storage period. This study represents the longest storage evaluation of the physiochemical parameters and bactericidal efficacy of acidic ECAS within the published literature and reveals that acidic ECAS retain useful bactericidal activity for in excess of 12 months, widening potential applications. © 2013 by the authors; licensee MDPI, Basel, Switzerland.

Citation

Robinson, G., Thorn, R., & Reynolds, D. (2013). The effect of long-term storage on the physiochemical and bactericidal properties of electrochemically activated solutions. International Journal of Molecular Sciences, 14(1), 457-469. https://doi.org/10.3390/ijms14010457

Journal Article Type Article
Publication Date Jan 1, 2013
Deposit Date Jan 14, 2013
Publicly Available Date Mar 28, 2024
Journal International Journal of Molecular Sciences
Print ISSN 1661-6596
Electronic ISSN 1422-0067
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 14
Issue 1
Pages 457-469
DOI https://doi.org/10.3390/ijms14010457
Keywords electrochemically activated solutions, disinfectants
Public URL https://uwe-repository.worktribe.com/output/955325
Publisher URL http://dx.doi.org/10.3390/ijms14010457

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