Changes in Volatile Compounds of Lanmaoa asiatica during Controlled Atmosphere Storage Using Electronic Nose Combined with Gas Chromatography-Ion Mobility Spectroscopy
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Abstract
The changes in volatile compounds of L. asiatica during controlled atmosphere storage (gas composition: O2 6% and CO2 10%, temperature: (5 ± 0.5) ℃, humidity: 90%) were investigated using electronic nose combined with gas chromatography-ion mobility spectrometry (GC-IMS). The results showed that aroma of the L. asiatica samples clearly changed during storage, particularly after 13 days, indicating the freshness reduced. There were 50 volatile compounds (monomer and dimers) detected using GC-IMS, including 16 aldehydes, 10 alcohols, 6 ketones, 1 acid, 1 ester and 16 un-identified compounds, the types and contents of volatile compounds were the highest at the 1st and 13th days of storage. During the controlled atmosphere storage, the types and content of aldehyde compounds decreased while that of keton compounds increased, benzene acetaldehyde and propanoic acid were the key arom compounds detected in L. asiatica. In general, electronic nose combined with GC-IMS could be an effective approach to quickly detect the freshness of the L. asiatica according to the volatiles changes.
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