Effects of Trisodium Phosphate and Sodium Chloride Dipping on the Microbial Quality and Shelf Life of Refrigerated Tray-packaged Chicken Breasts

Sallam, Khalid Ibrahim;Samejima, Kunihiko

  • Published : 20040800

Abstract

Effects of trisodium phosphate (TSP) and/or sodium chloride (NaCl) dipping on microbial quality and shelf life of chicken breasts were investigated during refrigeration. Chicken breasts were dipped in aqueous solution (w/v) of 10% TSP, 10% NaCl, combination of TSP and NaCl (7.5% + 7.5%) or distilled water (control) for 10 min, followed by tray-packaging storage at $2^{\circ}C$. During storage, chicken breasts dipped in TSP maintained almost constant pH, while pH of control or NaCl-treated samples significantly increased (P<0.05). TSP dipping resulted in initial reduction of $0.48\;and\;0.91log_{10}CFU/g$ in aerobic plate counts and Enterobacteriaceae count, respectively, when compared with control. By storage day 6, APC of control chicken breasts reached $6.91\;log_{10}\;CFU/g$, while TSP-treatment either alone or in combination with NaCl significantly delayed microbial growth (P<0.05) and extended shelf life of refrigerated chicken breasts up to 12 days, at which APC were 6.87 and 6.39, respectively, versus $9.58\;log_{10}\;CFU/g$ for control. Significant reductions in psychrotrophic and Enterobacteriaceae count were detected at the end of storage period in chicken breasts treated with TSP alone or in combination with NaCl, whereas such treatments had no significant effects on lactobacilli or mold and yeast populations.

Keywords

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