White Elizabeth, Kumar Govindaraj Dev, da Silva Andre Luiz Biscaia Ribeiro, Kerr William L, Cimowsky Samuel, Widmer J Andrew, Dunn Laurel L
Department of Food Science & Technology, University of Georgia, 100 Cedar St., Athens, GA 30602, USA.
Center for Food Safety, University of Georgia, 1109 Experiment St, Griffin, GA 30223, USA.
Foods. 2021 Jan 17;10(1):178. doi: 10.3390/foods10010178.
A novel produce wash consisting of pelargonic acid (PEL) emulsions was tested on tomatoes contaminated with a five-serovar cocktail. Ability to reduce contamination on the inoculated tomato surface, as well as mitigation of subsequent cross-contamination to uninoculated tomatoes washed in re-used/spent wash water were examined. Sanitizer efficacy was also examined over 1 and 7 d storage time (8 °C, recommended for red ripe tomatoes) and in the presence of 0.5% (/) organic load. PEL performed statistically the same ( ≤ 0.05) at both 30 mM and 50 mM concentrations and resulted in greater than 1, 5 and 6 log CFU/g reductions at 0 h, 1 d and 7 d, respectively, when compared to a water-only or no rinse (NR) treatment. This was also a significantly greater reduction than was observed due to chlorine (sodium hypochlorite) and peroxyacetic acid (PAA) at all time points ( ≤ 0.01). Organic load had no impact on sanitizer efficacy for all examined treatments. Finally, PEL had a deleterious impact on tomato texture. At 1 d, ca. 5 N and 7 N were required to achieve tomato skin penetration and compression, respectively, compared to >9 N and 15 N required by all other treatments ( ≤ 0.05). While PEL sanitizers effectively reduced inoculated and subsequent transfer to uninoculated tomatoes, reformulation may be necessary to prevent deleterious quality impacts on produce.
一种由壬酸（PEL）乳液组成的新型农产品清洗液在被五血清型混合菌污染的番茄上进行了测试。研究了其减少接种番茄表面污染的能力，以及减轻后续对接种过的番茄在重复使用/用过的清洗水中清洗时对未接种番茄的交叉污染的能力。还研究了在1天和7天储存期（8℃，推荐用于成熟红番茄）以及存在0.5%（/）有机负荷的情况下消毒剂的效果。PEL在30 mM和50 mM浓度下的统计表现相同（≤0.05），与仅用水冲洗或不冲洗（NR）处理相比，在0小时、1天和7天时分别使菌落形成单位/克减少大于1、5和6个对数。在所有时间点，这也比观察到的氯（次氯酸钠）和过氧乙酸（PAA）的减少量显著更大（≤0.01）。对于所有检测的处理，有机负荷对消毒剂效果没有影响。最后，PEL对番茄质地有有害影响。在1天时，分别需要约5 N和7 N的力来实现番茄表皮穿透和压缩，而所有其他处理需要大于9 N和15 N的力（≤0.05）。虽然PEL消毒剂有效地减少了接种菌以及后续向未接种番茄的转移，但可能需要重新配方以防止对农产品质量产生有害影响。
