Abstract:

The aroma components of prepackaged pure grape juice were investigated and their gas chromatography-mass
spectrometry (GC-MS) fingerprints were established by solid phase micro-extraction-gas chromatography-mass spectrometry
(SPME-GC-MS) combined with similarity evaluation for the first time. By utilizing the fingerprinting, the qualities of
3 kinds of commercial grape juice from 3 regions were assessed. The results showed that 38 main aroma components were
identified in commercial grape juice, with a total of 15 peaks being detected as the characteristic peaks, and their areas
accounted for more than 95% of the total peak area. The GC-MS fingerprints were analyzed by angle cosine and correlation
coefficient. It was concluded that a positive correlation was found between the similarity of GC-MS chromatograms and the
quality of grape juice. Prepackaged mixed juice, grape juice beverage and pure grape juice could be accurately identified by
their aroma components fingerprints. The GC-MS fingerprints of prepackaged pure grape juice can provide a scientific basis
for the quality control and authenticity identification of grape juice.

Key words: prepackaged pure grape juice, aroma component, gas chromatography-mass spectrometry fingerprints, chemometrics methods, quality evaluation