Resumo

INESTROZA-LIZARDO, Carlos  e  ESCALONA, Víctor Hugo. Emerging Sanitizers: An Alternative in the Postharvest of Arugula. Agrociencia Uruguay [online]. 2015, vol.19, n.1, pp.14-23. ISSN 1510-0839.

The aim of this work was to evaluate the effect of chlorine dioxide (3 and 5 mg L^-1; ClO₂ 3 and ClO₂ 5), peroxide hydrogen (30 and 50 mg L^-1; H₂O₂ 30 and H₂O₂ 50) and UV-C radiation (4 and 5 KJ m^-2; UV 4 and UV 5) on the respiration rate, color and microbiological load of arugula leaves (Eruca vesicaria), stored eight days under a passive modified atmosphere at 5 °C; and to compare them with sodium hypoclorite 100 mg L^-1; (NaClO 100). After the harvest, the leaves of arugula were transported from the field and stored for 24 h in a chamber at 5°C. The processing was carried out at 8 °C, where the leaves were washed by immersion for 3 min in potable water, before being subjected to different treatments. The microbiological quality was clearly influenced by the sanitizers evaluated. ClO₂ 5 and H₂O₂ 50 decreased the enterobacteria counts in 1.3 log CFU g^-1 compared to the raw material, while NaClO, ClO₂ 5 and H₂O₂ 50 were the most effective delaying the aerobic mesophilic bacteria, decreasing the counting between 1.0 and 1.4 log CFU g^-1. Unlike NaClO, ClO₂ also reduced the load of psychrophile microcoorganisms. All treatments preserved the color of the leaves. These results suggest that ClO₂ and H₂O₂ can be used as an alternative to NaClO in the postharvest washing of arugula leaves considering microbiological quality and green color during refrigerated storage.

Palavras-chave : SODIUM HYPOCLORITE; CHLORINE DIOXIDE; HYDROGEN PEROXIDE; UV-C RADIATION; VEGETABLES.

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