Analysis of Quality after Sous Vide of Pork Loin Wet-aged using Pulsed Electric Field System

The effects of wet-aging using a commercial refrigerator (CR, 4°C) and a pulsed electric field refrigerator (PEFR, 0 and ˗1°C) on the quality of sous vide pork loin were analyzed. The moisture and fat contents, pH, lightness, yellowness, chroma, and shear force of the wet-aged samples were lower than those of the raw meat samples, whereas the water holding capacity (WHC) was higher. The PEFR group showed higher pH, yellowness, chroma, and WHC and lower weight loss than the CR samples. Electronic nose analysis indicated that positive flavor compounds were induced whereas negative flavor compounds were inhibited in the PEFR group. Wet-aging increased the sourness, saltiness, and umami of sous vide pork loin; the PEFR 0°C samples showed the highest umami. Sensory evaluation indicated that wet-aging improved the color of sous vide pork loin. The PEFR 0°C samples were rated higher than the raw meat and CR samples for all sensory traits. In conclusion, sous vide after wet-aging using a PEFR improved the quality of pork loin.