Preservation of fruits; a study based on monitoring vocs by the novel Proton Transfer Mass Spectrometry method (PTR-MS)
Boschetti A.; Fadanelli L.; Vescovi M.; Barbon D.; Tonini A.; Weber A.; Stoppa G. and Iannotta S.
5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.121
2004
บทคัดย่อ
Preservation of fruits; a study based on monitoring vocs by the novel Proton Transfer Mass Spectrometry method (PTR-MS)
Volatile Organic Compounds (VOS) could be fruitfully used as a non destructive method to monitor the state and quality of fruits and vegetable. In particular, as we have previously shown (Postharvest Biology and Technology 17 (1999) 143) Proton Transfer Reaction Mass Spectrometry (PTR-MS) could be nicely used to qualify post-harvest preservation and quality. This is in fact a very sensitive and real time instrumentation that allows the monitoring of a large number of organic volatile organic compounds down to a few pptv sensitivity.
Using such an apparatus we have investigated the preservation under a variety of different conditions and treatments of Renette Canada, Red and Golden Delicious apples over the whole storage period. The experimental data show that the VOC are very sensitive to the different storing conditions and treatments. Slightly different controlled atmospheres (Renette Canada); internal low oxygen stress (ILOS) treatments (Red Delicious) and ethylene inhibition chemical treatments (Gloden Delicious) produce very significant differences in the VOC emission spectra that keep being observed over the whole conservation period and during the shelf life. Studies on berry fruits, which are characterized by short preservation time, have also been carried out. In particular we have investigated different modified atmospheres aiming at optimizing the quality during preservation of blueberries. The effects on the VOC emission have been clearly observed and correlated to the final product state and quality.
The data have been analyzed using relative principal component statistical analysis that confirm the ability of PTR-MS as a reliable and very sensitive way to discriminate the different procedures and conservation receipts by detecting organic volatile compounds. The method is envisaged as being very promising to optimize fruit quality during the whole chain of storage and marketing.