'Fuji' apple (Malus domestica Borkh. volatile production during high pCO2 controlled atmosphere storage
Abstract 'Fuji' apple volatile compound dynamics were characterized during cold storage in air or at low pO 2 controlled atmosphere (CA) with up to 5 kPa CO 2 Volatile compounds in storage chambers were adsorbed onto solid sorbent traps and analyzed by GC MS. Fruit volatile production differed quantitatively by CO 2 concentration. Production of butyl, hexyl, and propyl esters by apples stored in CA was lower compared with that by fruit stored in air, while methyl and ethyl ester contents increased during CA storage compared with air. CO 2 injury incidence was highest in fruit stored in CA at 5 kPa CO 2 an atmosphere where methyl ester accumulation may provide an early indication of CO 2 injury development.