Calculated Mean Content Values
| Units |
Average |
Min |
Max |
Standard Deviation |
| mg/100 ml |
4.74 |
0.65 |
10.26 |
2.75 |
| mol/100 ml |
1.07e-05 |
1.47e-06 |
2.32e-05 |
6.22e-06 |
Values calculated by aggregating data from 18
different samples
from
2 unique
publications.
Aglycone Mean Content Values
| Aglycone |
Units |
Average |
Min |
Max |
Standard Deviation |
| (+)-Catechin |
mg/100 ml |
3.11 |
0.43 |
6.73 |
1.80 |
| mol/100 ml |
7.02e-06 |
9.64e-07 |
1.52e-05 |
4.08e-06 |
| Gallic acid |
mg/100 ml |
1.82 |
0.25 |
3.95 |
1.06 |
| mol/100 ml |
4.12e-06 |
5.65e-07 |
8.92e-06 |
2.39e-06 |
Original Content Values Used to Produce Means
Liang, Y.; Lu, J.; Zhang, L.; Wu, S.; Wu, Y. (2003) Estimation of black tea quality by analysis of chemical composition and colour difference of tea infusion. Food Chemistry 80:283-290
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
2.00 mg/100 ml
|
China black tea 2 |
no |
1 |
|
1.90 mg/100 ml
|
China black tea 3 |
no |
1 |
|
1.84 mg/100 ml
|
China black tea 4 |
no |
1 |
|
5.04 mg/100 ml
|
China black tea 5 |
no |
1 |
|
4.94 mg/100 ml
|
China black tea 6 |
no |
1 |
|
5.36 mg/100 ml
|
China black tea 7 |
no |
1 |
|
5.58 mg/100 ml
|
China black tea 8 |
no |
1 |
|
5.90 mg/100 ml
|
China black tea 1 |
no |
1 |
|
7.38 mg/100 ml
|
China black tea 9 |
no |
1 |
|
7.80 mg/100 ml
|
China black tea 10 |
no |
1 |
|
6.78 mg/100 ml
|
China black tea 11 |
no |
1 |
|
10.26 mg/100 ml
|
China black tea 12 |
no |
1 |
|
5.10 mg/100 ml
|
China black tea 13 |
no |
1 |
|
8.28 mg/100 ml
|
China black tea 14 |
no |
1 |
|
1.88 mg/100 ml
|
China black tea 15 |
no |
1 |
|
3.12 mg/100 ml
|
China black tea 16 |
no |
1 |
|
1.44 mg/100 ml
|
China black tea 17 |
no |
1 |
Long, H.; Zhu, Y.; Huang, T.; Coury, L.A.; Kissinger, P.T. (2001) Identification and determination of polyphenols in tea by liquid chromatography with multichannel electrochemical detection. Journal of Liquid Chromatography and Related Technologies 24:1105-1114
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
0.65 mg/100 ml
|
Black tea infusion, Hoji-cha, Japan |
no |
1 |