| 郑清梅， 陈昆平， 钟艳梅，等.4类茶叶及其茶渣主要成分的测定与分析[J].广东农业科学,2015,42(6):8-13 |
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4类茶叶及其茶渣主要成分的测定与分析 |
| Determination and analysis of main componentsof four kinds of tea and their tea wastes |
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| DOI： |
| 中文关键词: 茶叶 茶渣 茶多酚 游离氨基酸总量 营养成分 |
| 英文关键词: tea tea wastes tea polyphenols free amino acids nutritional component |
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| 中文摘要: |
| 以绿茶、铁观音、红茶、普洱等 4 类茶及其相应的茶渣为试验材料，采用国标法分别测定茶多酚、游
离氨基酸及常规营养成分的含量。 结果表明：4 类茶渣的茶多酚含量为 4.2%~10.1%， 显著低于其相应的茶叶
（6.5%~17.8%），但仍相应保留其茶叶的 60%以上；游离氨基酸含量为 1.1%~1.4%，亦显著低于相应茶叶（1.2%~
2.2%），但仍为相应茶叶的 60%以上；相反，粗纤维含量（13.0~19.0%）显著高于其相应茶叶的含量（10.0%~
16.0%）。 常规营养成分测定结果显示， 该 4 类茶渣粗蛋白含量 （26.0%~35.0%） 稍高于相应的茶叶 （25.0%~
35.0%），水分含量（7.81%~8.82%）显著高于其相应茶叶的含量（4.5%~7.2%）；相反，粗脂肪含量为 1.5%~4.5%，
显著低于相应茶叶的含量（4%~11%）；总灰分（3.3%~4.7%）亦显著低于其相应茶叶的含量（5.0%~7.0%）。 可见，
茶渣仍含有茶叶较高的活性成分包括茶多酚、游离氨基酸和主要营养成分，为茶渣的开发利用提供理论依据。 |
| 英文摘要: |
| With 4 kinds of tea (i.e. green tea, Ti Kwan Yin tea, black tea, Pu-er tea) as experimental materials,
the contents of tea polyphenols, free amino acids and nutrient component in the tea and their tea wastes were
determined by national standard method, respectively. The results showed that the content of tea polyphenols in the 4
kinds of tea wastes was 4.2%-10.1%, which was significantly lower than that in the corresponding tea (6.5%-17.8%),
but which was retained more than 60% of that in the corresponding tea. Similarly, the content of free amino acids in
the 4 kinds of tea wastes was 1.1%-1.4%, which was significantly lower than that in the corresponding tea (1.2%-
2.2%), and also retained more than 60% of that in the corresponding tea. However, the content of crude fiber (13.0%
-19.0%) in the 4 kinds of tea wastes was significantly higher than that in the corresponding tea (10.0%-16.0%),
respectively. The results of determination of nutritional ingredients showed that the content of crude protein (26.0%-
35.0%) in the 4 kinds of tea wastes was slightly higher than that in the corresponding tea (25.0%-35.0%),
respectively. But the content of moisture in the 4 kinds of tea wastes (7.81%-8.82%) was significantly higher than
that in the corresponding tea (4.5%-7.2%) respectively. Conversely, the content of crude fat in the 4 kinds of tea
wastes (1.5%-4.5%) was significantly lower than that in the corresponding tea (4%-11%), respectively. And the
content of total ash in the 4 kinds of tea wastes (3.3% -4.7%) was also significantly lower than that in the corresponding tea (5.0%-7.0%), respectively. The active
and nutritional ingredients in tea wastes still contained
high tea polyphenols, amino acids and main nutritional
components, which could provide a theoretical basis for
the development and utilization of tea wastes. |
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