Effect of Ultrasonic Treatment on the Volatile Components of Gan-pu Tea
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Abstract:
Automatic headspace solid-phase microextraction (HS-SPME) combined with gas chromatography-mass spectrometry (GC-MS) was used to determine and analyze the volatile components of Gan-pu tea before and after ultrasonic treatment. The results showed that the volatile components of Gan-pu tea came from the peel of Citrus reticulata ‘Chachi’ and ripe Pu'erh tea, and the main volatile constituents were limonene, pinene, beta-myrcene, gamma-terpinene, linalool, terpineol, methyl N-methylanthranilate, 1,2,3-trimethoxybenzene, and others. Ultrasonic treatment could affect the relative volatile component content in different parts of Gan-pu tea. Compared with those of the samples before ultrasonic treatment, for the peel of Citrus reticulata ‘Chachi’, the relative content of alpha-thujene, alpha-pinene, and other components were reduced, and the content of o-cymene and decanal were increased. After ultrasonic treatment, for the Pu'erh tea, the content of butyl acetate, N,N-dimethylformamide, alpha-phellandrene, linalool, terpineol, 1,2,3-trimethoxy-benzene, and others were increased, and the content of beta-myrcene, D-limonene, gamma-terpinene, and 4-ketoisophorone were decreased. The magnitude of variation of each component content was increased with increasing ultrasonication time during the experiment.
