Journal
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
Volume 81, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ifset.2022.103123
Keywords
Plasma-activated water (PAW); Sprouts; Fresh produce sanitation; Aerobic plate count; Quality; E. coli inactivation
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Funding
- United States Department of Agriculture's (USDA) National Institute of Food and Agriculture (NIFA) [2018-67018-28146, NC02754, NC1023]
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This study investigated the effectiveness of plasma-activated water (PAW) as a sanitizer for sprout washing. The results showed that PAW and chlorine (Cl) both achieved significant reductions in microbial counts on sprouts, with no significant difference in sprout quality.
This study investigated plasma-activated water (PAW) as a sanitizer for the washing of sprouts. Alfalfa sprouts, broccoli sprouts, and clover sprouts were washed with PAW, chlorine (Cl, 200 ppm), or deionized water. The inactivation of aerobic mesophilic microorganisms and inoculated scherichia coli DH5a was evaluated. The quality of sprouts was assessed based on visual color change (Delta E) and plant tissue damage (measured by electrolyte leakage). Significant reductions of 1-2 log CFU/g in aerobic mesophilic microorganisms were achieved by PAW and Cl on clover sprouts and alfalfa sprouts. Reductions of E. coli ranging between 1.4 +/- 0.4 log CFU/g and 3.5 +/- 0.9 log CFU/g were achieved by PAW on the sprouts (original counts: 6.4 to 8.1 CFU/g), which were comparable to Cl except for the case of alfalfa sprouts where Cl achieved the highest inactivation. No significant quality difference in terms of visual color change or electrolyte leakage was observed in sprouts washed by PAW and Cl.
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