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低温复式加工技术对红茶香气的影响

Effect of Low-temperature Multi-process on Aromatic Quality of Black Tea

  • 摘要: 以茗科1号为试验材料,采用同时蒸馏萃取提取茶叶香气,气相色谱-质谱联用测定其香气成分,探讨低温复式加工技术对红茶香气的影响。结果表明:不同加工技术的红茶中共检出香气成分54种,共有的香气成分30种,以碳氢化合物、醇类、醛类、酯类为主。低温复式加工技术,提高了茶叶中具有花果香味的苯甲醛、吲哚、己酸-3-己烯酯、已酸已酯、顺-茉莉酮、α-法尼烯、橙花叔醇、雪松醇等的含量,降低了具有青草气青叶醇的含量,提高了茶叶的香气品质。

     

    Abstract: Aromatic components of black tea samples made from various processing technologies were extracted by means of simultaneous distillation extraction (SDE) for the subsequent identifications by gas chromatography-mass spectrometry (GC-MS). A total of 54 aromatic constituents were identified with 30 of them commonly found in all samples. The major aromatics included hydrocarbons, alcohols, aldehydes, and esters. By comparison, the low-temperature, multi-process technology increased the contents of benzaldehyde, indole, hexanoic acid-3-hexenyl ester, hexanoic acid hexyl ester, cis-jasmone, α-farnesene, nerolidol, and cedrol that constitute the flowery and fruity fragrance, and decreased that of the undesirable 2-hexenal with grassy note in the tea. Thus, the newly developed process appeared to have improved the aromatic quality of the black tea.

     

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