Volatile comparison of different environment stored litchi based on SPME-GC-MS

The volatile change of 3 different environment( room temperature,refrigerator and controlled atmosphere)stored litchi within 5 days were determined using solid phase micro- extraction- gas chromatography- mass spectrometer( SPME- GC- MS) technology. The results showed that alkene,alkanes,alcohols and ketones exist in litchi volatile and the content of alkene was the highest.When storing at room temperature,the main component of litchi's volatiles was alkene.And the content of the alkene was increased constantly from 0 to 2th d,then waving at certain and high number range. When storing at refrigerator,the content of alkene was the highest,which was increased constantly during 0 to 3 th d,and decreased at the 4 th d.There were less alkanes,alcohols and ketones exists in refrigerator litchi storage enviroment.The main volatile of litchi stored at controlled atmosphere environment was alkene which occupies more than 80% of the total from 0 to 4 th d. There were few alkanes,alcohols and ketones detected.In addition,there were no alkanes and extra aromatic components( alcohols and ketones)detected when litchi storing at room temperature,which were exist at refrigerator and controlled atmosphere environment stored litchi.This experimental can provide reference for litchi storage and quality detection according to its volatiles.