Ester variability in apple varieties as determined by solid-phase microextraction and gas chromatography-mass spectrometry
| Autor: | J. Christopher Young, Honghui Zhu, C L George Chu, Xuewen Lu |
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| Rok vydání: | 2004 |
| Předmět: |
Malus
Chromatography Time Factors biology Chemistry Pigmentation Rosaceae Food preservation Temperature Esters General Chemistry biology.organism_classification Solid-phase microextraction Mass spectrometry Gas Chromatography-Mass Spectrometry Species Specificity Food Preservation Fruit Fiber Gas chromatography Gas chromatography–mass spectrometry General Agricultural and Biological Sciences Sesquiterpenes |
| Zdroj: | Journal of agricultural and food chemistry. 52(26) |
| ISSN: | 0021-8561 |
| Popis: | Solid-phase microextraction (SPME) with a polydimethylsiloxane fiber coupled with gas chromatography-mass spectrometry (GC-MS) was applied to the study of variability in volatiles released by 13 apple varieties. The relative amounts of 40 esters and alpha-farnesene were determined. Principal component analyses of these results clustered the apples into three groups according to skin color: red, green, and red-green. Total ester contents were highest with the red cluster apples, and the green cluster apples had the highest alpha-farnesene levels. This technology was also applied to the monitoring of changes in volatiles for apples removed from controlled-atmosphere storage with subsequent storage at 4 degrees C and room temperature. Total ester contents increased 25-fold, with the greater increases coming at room temperature, whereas alpha-farnesene levels increased only 5-fold. For apples stored at room temperature, after 11 days, the amount of increase was inversely proportional to the size of the ester: levels of smallest esters (molecular weight 116) increased 12.5-fold, and the largest esters (molecular weight 228) increased approximately 1.3-fold. |
| Databáze: | OpenAIRE |
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