you could use GC for aroma detection . 

Thanks for your answer Manal. In GC, you can measure the change of one standard aroma component known to you, how will you measure a mixture of aroma volatile which may be generated during storage due to certain physiological/ chemical interactions? I want to know the change in total aroma profile, is it possible by using GC?

It seems difficult only by GC. You need GC-MS. We do this kind of determination in our lab. Please have a look to my publications on the packaging of orange juice by PET. If you want to monitor the transfer of aroma compounds throughout the packaging , you can do it by seeting your pack+ fruit in an hermetic cell then by using SPME fiber you can trap the molecules which appears in the cell along time. So you can follow the transfer of aroma throughout your package with time.

http://www.google.com/patents/US5361625

http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2621.1987.tb06641.x/abstract

http://onlinelibrary.wiley.com/doi/10.1111/j.1750-3841.2010.01785.x/full

Thank you Sir 

You can use  Head space analyzer using SPME technique

Hermetic sealing + GC-MS as suggested by Violette is practical and good option. If you could get access to PTR-MS- will provide real-time data for all the volatiles.

If GC-MS not accessible- put inside a hermetic chamber- go for gas phase FTIR absorption spectroscopy- will give relative contents

Read the attached files.

Gas chromatography is a good instrumental method.

Esam H. Mansour

Two chamber separated by the test specimen. Test gas in one chamber. After time to allow sorption/diffusion/desorption GC the "empty chamber

http://newsletter.epfl.ch/alliance/index.php?module=epflfiles&func=getFile&fid=308&inline=1

Thanks Ricardo for sharing the article.