正山小种红茶挥发性成分分析

Analysis of volatile components of Lapsang Souchong black tea

采用顶空固相微萃取结合气相色谱-质谱联用对不同价位的正山小种红茶的挥发性成分进行了分析。结果表明,不同价位正山小种红茶主要挥发性成分都包括醇类、醛类、碳氢类、酯类、酚类、酮类、酸类、含氮类以及杂氧类化合物,但各类化合物在不同红茶中的相对含量存在差异。红茶A(高价位)中苯乙醇(11.05%),苯甲醇(7.88%),香叶醇(5.75%),苯甲醛(5.33%),水杨酸甲酯(3.74%)和(E,E)-3,5-辛二烯-2-酮(3.42%)等成分相对含量较高。红茶B(中等价位)中香叶醇(7.4%),愈创木酚(5.83%),苯酚(4.21%),2-吡咯甲醛(3.63%),萘(3.53%)和水杨酸甲酯(3.51%)等成分相对含量较高。红茶C(低价位)中香叶醇(7.98%),苯乙醇(7.32%),苯甲醛(7.13%),苯甲醇(3.33%),水杨酸甲酯(3.24%),糠醛(2.52%)等成分相对含量较高。

The volatile components in different price Lapsang Souchong black tea（A,B and C） were analyzed using headspace-solid-phase microextraction-gas chromatography-mass spectrometry（HS-SPME-GC-MS）. The results showed that the volatile compositions of the entire different price Lapsang Souchong black tea include alcohols,aldehydes,hydrocarbons,esters,phenolic compounds,ketones,nitrogenous compounds and heterocyclic oxygen compounds. But the relative amounts of the compounds varied a lot in different tea. In the Lapsang Souchong black tea A（high price）,the contents of phenylethyl alcohol（11.05%）,benzyl alcohol（7.88%）,geraniol（5.75%）,benzaldehyde（5.33%）,methyl salicylate（3.74%） and（E,E）-3,5-Octadien-2-one（3.42%） were higher. While in the black tea B（the medium price）,the relative amounts of geraniol（7.4%）,creosol（5.83%）,phenol（4.21%）,1H-Pyrrole-2-carboxaldehy（3.63%）,naphthalene（3.53%） and methyl salicylate（ 3. 51 %） were higher. And then in the black tea C（ low price）, the relative amounts of geraniol（7.98%）,phenylethyl alcohol（7.32%）,benzaldehyde（7.13%）,benzyl alcohol（3.33%）,methyl salicylate（3.24%）and furaldehyde（2.52%） were higher.