Changes in Electrical Resistance of Eggplant with Gloss, Weight and Storage Period

Non-destructive physical tests are recent trends for quality evaluation of fruits and vegetables. Information on post-harvest variations in electrical resistance, gloss and weight are needed to develop new instruments for this purpose. Surface electrical resistance, surface gloss and weight of eggplant (Solanum melongena L.) fruits stored for 0–96 h at 20°C temperature and 80–84% relative humidity were measured using a galvanometer, spectral radiometer and a precision electronic balance, respectively. Relationships of surface electrical resistance with gloss and weight loss during storage were also investigated. The surface electrical resistance increased quadratically with increase in storage period and with decrease in both weight and gloss index of eggplant during storage.