ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Evaluation of physico-chemical parameters of minimally processed apples packed in non-conventional modified atmosphere

Pietro Rocculi, Santina Romani and Marco Dalla Rosa

Food Research International Volume 37, Issue 4 , May 2004, Pages 329-335

2004

บทคัดย่อ

Modified atmosphere packaging (MAP) with non-conventional gas mixtures in combination with non-sulphite dipping was tested during refrigerated storage o­n minimally processed(MP) apple slices for the physico-chemical characteristics. ‘Golden Delicious' apple slices were dipped in an aqueous solution of 0.5% of ascorbic acid (AA), 0.5% of citric acid (CA), and 0.5% of calcium chloride (CC) to slow down the enzymatic browning. Apple slices were sealed in polypropylene boxes and conditioned in air (control) and in three different modified atmospheres (MAs) composed of 90% N₂, 5% O₂, 5% CO₂ (A), 90% N₂O, 5% O₂, 5% CO₂ (B) or 65% N₂O, 25% Ar, 5% O₂, 5% CO₂ (C). The packed apple samples were stored at 4 °C for 12 days and pH, soluble solids content, weight loss, CO₂ production, O₂ consumption, texture changes, surface colour (whitening index, hue angle and chroma) and percentage of browning area were monitored. Beneficial effects of B and C MAP were found o­n enzymatic browning together with an increase of initial firmness and total soluble solid content. Atmospheres with high argon and nitrous oxide levels are shown some beneficial effect o­n the product quality during the 10 days period of storage, compared to control.