TABLE 1.
Quantification and relative content of identified compounds in Shuixian tea in different storage years.
| Compound class | Quantities | Relative content (%) | ||||
|---|---|---|---|---|---|---|
| 2006 | 2010 | 2014 | 2018 | 2020 | ||
| Amino acids and their metabolites | 359 | 10.70 | 14.83 | 14.67 | 14.50 | 13.45 |
| Benzene and its derivatives | 125 | 9.45 | 8.69 | 9.23 | 9.20 | 9.80 |
| Alcohols, amines | 35 | 2.12 | 1.59 | 1.71 | 1.78 | 1.84 |
| Glycero phospholipids | 65 | 1.81 | 4.68 | 4.07 | 3.62 | 3.49 |
| Triglyceride | 34 | 0.52 | 0.77 | 0.77 | 1.00 | 0.70 |
| Nucleotides and their metabolites | 42 | 4.79 | 3.32 | 3.26 | 3.68 | 3.50 |
| Flavonoid | 77 | 30.79 | 24.62 | 25.48 | 27.13 | 29.87 |
| Aldehydes, ketones, esters | 82 | 2.12 | 2.30 | 2.21 | 2.24 | 2.17 |
| Carbohydrates and their metabolites | 24 | 1.39 | 1.33 | 1.37 | 1.31 | 1.80 |
| Terpene | 11 | 0.14 | 0.10 | 0.10 | 0.10 | 0.08 |
| Organic acids and their derivatives | 124 | 11.77 | 7.70 | 8.55 | 8.36 | 7.93 |
| Heterocyclic compound | 75 | 14.75 | 11.06 | 11.52 | 11.52 | 10.96 |
| Fatty acyl class | 98 | 7.09 | 16.88 | 15.07 | 13.32 | 12.43 |
| Others | 50 | 2.56 | 2.14 | 2.01 | 2.24 | 1.99 |
Note: The relative content is determined by calculating the average of three replicate experiments.