# Development of Assessment Criteria for Managing the Quality of Taishan Black Tea
## 3 Results
### Quality and Composition Characteristics of Taishan Black Tea
#### 3.2.1 Quality Ingredients of Taishan Black Tea
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Sample**} & **Water** & \multirow{2}{*}{**Amino Acids/\%**} & **Tea** & \multirow{2}{*}{**Catechin/\%**} & **Caffeine/\%** & **Phenol-Ammonia** \\  & **Extracts/\%** & & & **Polyphenies/\%** & & **Ratio** \\ \hline CYB & 38.06 \(\pm\) 1.65 \({}^{\text{fg}}\) & 1.97 \(\pm\) 0.61 \({}^{\text{f}}\) & 10.30 \(\pm\) 0.50 \({}^{\text{g}}\) & 6.21 \(\pm\) 0.11 \({}^{\text{g}}\) & 2.05 \(\pm\) 0.27 \({}^{\text{def}}\) & 5.55 \(\pm\) 1.52 \({}^{\text{abc}}\) \\ TZF & 41.42 \(\pm\) 0.17 \({}^{\text{b}}\)dee & 2.30 \(\pm\) 0.50 \({}^{\text{ef}}\) & 12.01 \(\pm\) 1.67 \({}^{\text{ef}}\) & 7.22 \(\pm\) 0.72 \({}^{\text{f}}\) & 1.51 \(\pm\) 0.31 \({}^{\text{g}}\) & 5.44 \(\pm\) 1.78 \({}^{\text{abc}}\) \\ DCB & 39.52 \(\pm\) 0.79 \({}^{\text{ef}}\) & 2.20 \(\pm\) 0.17 \({}^{\text{ef}}\) & 14.80 \(\pm\) 2.36 \({}^{\text{b}}\) & 8.93 \(\pm\) 0.53 \({}^{\text{b}}\) & 2.16 \(\pm\) 0.22 \({}^{\text{b}}\)dee & 6.75 \(\pm\) 1.19 \({}^{\text{a}}\) \\ YMY & 41.53 \(\pm\) 0.21 \({}^{\text{b}}\) & 3.40 \(\pm\) 0.62 \({}^{\text{b}}\)dee & 14.62 \(\pm\) 1.14 \({}^{\text{b}}\) & 8.85 \(\pm\) 0.36 \({}^{\text{b}}\)dee & 2.08 \(\pm\) 0.35 \({}^{\text{def}}\) & 4.38 \(\pm\) 0.75 \({}^{\text{cde}}\) \\ JSY & 42.31 \(\pm\) 0.74 \({}^{\text{bc}}\) & 4.11 \(\pm\) 0.72 \({}^{\text{b}}\) & 14.14 \(\pm\) 1.41 \({}^{\text{b}}\) & 8.51 \(\pm\) 0.25 \({}^{\text{b}}\)dee & 2.6 \(\pm\) 0.31 \({}^{\text{abc}}\) & 3.56 \(\pm\) 1.01 \({}^{\text{ef}}\) \\ TMB & 40.61 \(\pm\) 0.26 \({}^{\text{cde}}\) & 3.01 \(\pm\) 0.20 \({}^{\text{de}}\) & 14.30 \(\pm\) 0.79 \({}^{\text{be}}\) & 8.61 \(\pm\) 0.13 \({}^{\text{b}}\) & 2.22 \(\pm\) 0.12 \({}^{\text{b}}\)dee & 4.77 \(\pm\) 0.2 \({}^{\text{b}}\)dee \\ TDH & 43.63 \(\pm\) 1.93 \({}^{\text{a}}\) & 3.52 \(\pm\) 0.17 \({}^{\text{b}}\) & 19.10 \(\pm\) 1.37 \({}^{\text{a}}\) & 11.40 \(\pm\) 0.44 \({}^{\text{a}}\) & 2.69 \(\pm\) 0.42 \({}^{\text{a}}\) & 5.46 \(\pm\) 0.44 \({}^{\text{b}}\) \\ DXY & 39.84 \(\pm\) 1.35 \({}^{\text{de}}\) & 3.41 \(\pm\) 0.26 \({}^{\text{b}}\) & 11.61 \(\pm\) 0.26 \({}^{\text{e}}\) & 7.03 \(\pm\) 0.85 \({}^{\text{g}}\) & 2.49 \(\pm\) 0.26 \({}^{\text{b}}\)dee & 3.42 \(\pm\) 0.25 \({}^{\text{ef}}\) \\ LYB & 42.80 \(\pm\) 1.77 \({}^{\text{ab}}\) & 2.74 \(\pm\) 0.21 \({}^{\text{def}}\) & 14.74 \(\pm\) 0.62 \({}^{\text{b}}\) & 8.82 \(\pm\) 0.89 \({}^{\text{be}}\) & 2.85 \(\pm\) 0.17 \({}^{\text{a}}\) & 5.46 \(\pm\) 0.30 \({}^{\text{abc}}\) \\ QRB & 41.32 \(\pm\) 0.53 \({}^{\text{b}}\)dee & 3.23 \(\pm\) 0.26 \({}^{\text{cd}}\) & 11.80 \(\pm\) 0.62 \({}^{\text{fg}}\) & 7.10 \(\pm\) 0.32 \({}^{\text{f}}\) & 2.41 \(\pm\) 0.11 \({}^{\text{ab}}\)dee & 3.71 \(\pm\) 0.49 \({}^{\text{def}}\) \\ CXG & 39.92 \(\pm\) 0.85 \({}^{\text{de}}\) & 2.74 \(\pm\) 0.62 \({}^{\text{def}}\) & 13.82 \(\pm\) 0.2 \({}^{\text{b}}\)dee & 8.34 \(\pm\) 0.26 \({}^{\text{b}}\)dee & 1.91 \(\pm\) 0.11 \({}^{\text{ef}}\) & 5.31 \(\pm\) 1.3 \({}^{\text{ab}}\) \\ JKB & 40.43 \(\pm\) 0.46 \({}^{\text{de}}\) & 3.47 \(\pm\) 0.56 \({}^{\text{b}}\) & 13.10 \(\pm\) 0.61 \({}^{\text{b}}\)dee & 7.91 \(\pm\) 0.71 \({}^{\text{def}}\) & 1.60 \(\pm\) 0.33 \({}^{\text{g}}\) & 3.91 \(\pm\) 0.49 \({}^{\text{def}}\) \\ LXG & 40.25 \(\pm\) 0.75 \({}^{\text{cde}}\) & 2.30 \(\pm\) 0.17 \({}^{\text{ef}}\) & 14.58 \(\pm\) 0.3 \({}^{\text{b}}\) & 8.73 \(\pm\) 0.44 \({}^{\text{be}}\) & 2.52 \(\pm\) 0.45 \({}^{\text{b}}\)dee & 6.32 \(\pm\) 0.38 \({}^{\text{ab}}\) \\ DXB & 37.43 \(\pm\) 0.36 \({}^{\text{g}}\) & 2.61 \(\pm\) 0.34 \({}^{\text{def}}\) & 12.60 \(\pm\) 0.62 \({}^{\text{def}}\) & 7.62 \(\pm\) 0.36 \({}^{\text{def}}\) & 2.3