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Pulsed electric fields (PEF), high pressure processing (HPP) and conventional method of heating (90 °C, 60s) were evaluated as blanching methods for fresh cut apples. The settings employed for PEF and HPP were 1.5 kV/cm, 100 pulses, 4 Hz and 600 MPa for 2 min respectively. The blanched samples were soaked in sucrose solution (60°Brix, 60 min) containing ascorbic acid, citric acid, sodium benzoate, and potassium sorbate. The treated samples were packed and pasteurized using either hot water (90 °C, 15 min) or HPP (600 MPa, 10 min). These samples were analyzed for physicochemical and microbiological attributes immediately after treatment and after 2 months of cold storage. The combination of different hurdles in all groups completely inhibited microbial growth. However, in terms of color values and texture retention, the apple cuts treated with PEF followed by hot water pasteurization were of a better quality when compared to HPP pasteurized ones (P &lt; 0.05).

Effect of non-thermal hurdles in extending shelf life of cut apples