Study summary

Direct measurement of chlorine penetration into biofilms during disinfection

Journal of Food Protection · 2007

Summary

Abstract

This study evaluated the efficacy of neutral electrolyzed water (NEW; 64.1 mg/liter of active chlorine) to reduce populations of Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Listeria monocytogenes on plastic and wooden kitchen cutting boards. Its effectiveness was compared with that of a sodium hypochlorite solution (NaClO; 62.3 mg/liter of active chlorine). Inoculated portions of cutting boards were rinsed in either NEW or NaClO solutions, or deionized water (control). Plastic boards were rinsed for 1 min and wooden boards for 1 and 5 min. After each treatment, the surviving population of each strain was determined on the surface and in the soaking water. No significant difference (P 0.05) was found between the final populations of each strain with regard to the treatment solutions (NEW or NaClO). However, a significant difference (P 0.05) was revealed between surface materials after 1 min of washing. Whereas in plastic boards the initial bacterial populations were reduced by 5 log CFU/50 cm2, in wooden cutting boards they underwent a reduction of

Study details

  • Published in: Journal of Food Protection 70.1 (2007): 102-108
  • Microbes studied: Escherichia coli, Listeria monocytogenes, Pseudomonas aeruginosa, Staphylococcus aureus

Source

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Source: Journal of Food Protection 70.1 (2007): 102-108

Conditions tested

ParameterValue
OrganismsEscherichia coli, Listeria monocytogenes, Pseudomonas spp., Staphylococcus spp.
Relevant sectorsContact surfaces, Food Processing
PublicationJournal of Food Protection, 2007

Reading this responsibly

Published figures are obtained under controlled conditions, usually on clean surfaces or in defined matrices. Organic load, surface condition, temperature and application coverage all affect real-world performance. Use these numbers to design a protocol, then validate it on your own site with environmental swabbing.

Applying it

Concentrations in this range are within the adjustable output of every EcoloxTech commercial system, so implementing this protocol is a settings question rather than a procurement one. Where the claim needs to sit on a registered label, see HOCl-AS200, EPA Reg. No. 101112-1.

Source

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