| 摘要 |
A method for discriminating real and fake jasmine tea is provided to improve accuracy and convenience of discrimination, so that consumers, traders and customs examiners easily discriminate the real and fake jasmine tea and damage caused by smuggling of fake jasmine tea is inhibited. A method for discriminating real and fake jasmine tea comprises the steps of: (1) heating tea leaves in hot water to prepare tea leaf juice and preparing a tea leaf sample by using the tea leaf juice; (2) adsorbing VFC(volatile flavor components) from the tea leaf juice sample through SPME(Solid-Phase Microextraction) device; (3) introducing the SPME device into a GC(gas chromatography) inlet to desorb the VFC; and (4) analyzing VFC with GC-MS(gas chromatography-mass spectroscopy) analysis, wherein the fake jasmine tea is discriminated by detecting more than 1% of herb flavor components based on the total peck area of GC prior to cis-3-hexanol; and the herb flavor component is selected from n-hexenal, 2-penten-1-ol, 3-ethyl-2-methyl-1-pentene, pentanal, 1-penten-3-one, 1-penten-3-ol, 2-methyl butanal and 3-methyl butanal. |
