Journal
POULTRY SCIENCE
Volume 79, Issue 12, Pages 1857-1860Publisher
POULTRY SCIENCE ASSOC INC
DOI: 10.1093/ps/79.12.1857
Keywords
acidified sodium chlorite; sodium thiosulfate; microbial testing; poultry processing; food protection
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At low pH, acidified sodium chlorite (ASC) has antimicrobial activity against a variety of foodborne contaminants. To evaluate the antimicrobial efficacy of ASC at specific time points posttreatment, it is necessary to halt the action of the disinfectant by removing residual chlorite or by increasing the pH. In this study, thiosulfate was investigated at varying concentrations for its effect on microbial survival and was investigated at a concentration of 0.1% in the presence of ASC for its effect on the antimicrobial and chemical activity of the test solution. Additionally, sodium thiosulfate was tested in two buffering systems, buffered peptone water (BPW) and Butterfield's phopshate buffer (BPB), for its ability to inactivate ASC chemistry. The results of this study show that, at a concentration of 0.1%, sodium thiosulfate has no deleterious effect on Escherichia roll survival and is effective in halting the antimicrobial action of ASC by eliminating the production of residual chlorite. The BPW alone and BPB in combination with thiosulfate were found to be effective inactivators of ASC chemistry.
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