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Effect of controlled-release chlorine dioxide on the quality and safety of cherry/grape tomatoes

二氧化氯 交替链格孢 化学 人口 园艺 接种 食品科学 肠沙门氏菌 生物 大肠杆菌 生物化学 医学 无机化学 环境卫生 基因
作者
Xiuxiu Sun,Bin Zhou,Yaguang Luo,Christopher Ference,Elizabeth A. Baldwin,Ken Harrison,Jinhe Bai
出处
期刊:Food Control [Elsevier BV]
卷期号:82: 26-30 被引量:37
标识
DOI:10.1016/j.foodcont.2017.06.021
摘要

Abstract The effect of controlled-release chlorine dioxide (ClO2) gas on the food safety and quality of cherry/grape tomatoes was investigated. Whole grape tomatoes artificially inoculated with either Escherichia coli or Alternaria alternata, or whole cherry tomatoes inoculated with Salmonella enterica Newport, were packed in 1-lb clamshells, and stored at 20 °C for 14 days. ClO2 pouches were attached under the lids with the following four dosages/release rates: single dose slow-release (S), single dose fast-release (F), fast/slow-release combination (FS), and double dose fast-release (FF). The corresponding equilibrium ClO2 concentration in the headspace was about 2, 4, 6 and 8 ppm, respectively. Treatment with F reduced populations of E. coli and A. alternata by 2.9–4.7, and 1.6 to 4.0 log CFU/g, respectively, within 14 days storage at 20 °C. FS and FF treatments showed little benefit over F. The F and FF treatments reduced population of S. enterica for inoculated cherry tomatoes by 3.28 and 3.80 log CFU/g, respectively, compared to control after 14 days’ storage at 20 °C. ClO2-treated grape tomatoes retained higher firmness and had less weight loss compared to the control. The results indicate that 2 ppm of ClO2 (S) in the clamshells did not adequately control microbial populations; the minimum effective concentration of ClO2 was 4 ppm (F). Higher concentrations provided a small but incremental improvement in ability to control microorganisms. ClO2 released into packages of cherry tomatoes during storage reduced weight loss, while maintaining firmness.
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