Application of photoacoustic spectroscopy in monitoring emission of C 2H 4 and CO 2 in passion fruit stored under different atmospheres.

摘要

The present work shows the application of the photoacoustic spectrometer in the monitoring of the ethylene emission rate in passion fruit submitted to different types of atmosphere storage. Three types of modified atmosphere were applied: (1) 100% N 2 and 0% O 2 (MA1), (2) 97% N 2 and 3% O 2 (MA2) and (3) 94% N 2 and 6% O 2 (MA3). The respiratory rate and parameters of the skin color as CIE a, b and angle hue were monitored and correlated with the ethylene emission rate. The loss of mass was also evaluated. Results indicated that atmospheres with oxygen concentrations below 3% cause fruit damage, evident as fermentation and presence of fungus in the skin, while 6% oxygen led to a 2 day increased in shelf life. CT XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on Postharvest Technology in the Global Market, Lisbon, Portugal.