Calculated Mean Content Values
| Units |
Average |
Min |
Max |
Standard Deviation |
| mg/100 ml |
4.08 |
0.20 |
17.52 |
4.08 |
| mol/100 ml |
5.69e-06 |
2.79e-07 |
2.44e-05 |
5.70e-06 |
Values calculated by aggregating data from 33
different samples
from
3 unique
publications.
Aglycone Mean Content Values
| Aglycone |
Units |
Average |
Min |
Max |
Standard Deviation |
| Theaflavin |
mg/100 ml |
3.21 |
0.16 |
13.80 |
3.22 |
| mol/100 ml |
4.48e-06 |
2.20e-07 |
1.93e-05 |
4.49e-06 |
| Gallic acid |
mg/100 ml |
0.97 |
0.05 |
4.16 |
0.97 |
| mol/100 ml |
1.35e-06 |
6.63e-08 |
5.80e-06 |
1.35e-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 |
|
0.80 mg/100 ml
|
China black tea 2 |
no |
1 |
|
1.82 mg/100 ml
|
China black tea 3 |
no |
1 |
|
1.66 mg/100 ml
|
China black tea 4 |
no |
1 |
|
1.58 mg/100 ml
|
China black tea 5 |
no |
1 |
|
4.30 mg/100 ml
|
China black tea 6 |
no |
1 |
|
12.28 mg/100 ml
|
China black tea 7 |
no |
1 |
|
6.08 mg/100 ml
|
China black tea 8 |
no |
1 |
|
4.44 mg/100 ml
|
China black tea 1 |
no |
1 |
|
6.58 mg/100 ml
|
China black tea 9 |
no |
1 |
|
17.52 mg/100 ml
|
China black tea 10 |
no |
1 |
|
4.56 mg/100 ml
|
China black tea 11 |
no |
1 |
|
11.98 mg/100 ml
|
China black tea 12 |
no |
1 |
|
10.84 mg/100 ml
|
China black tea 13 |
no |
1 |
|
9.76 mg/100 ml
|
China black tea 14 |
no |
1 |
|
1.58 mg/100 ml
|
China black tea 15 |
no |
1 |
|
3.46 mg/100 ml
|
China black tea 16 |
no |
1 |
|
2.02 mg/100 ml
|
China black tea 17 |
no |
1 |
Stewart A.J., Mullen W., Crozier A. (2005) On-line high-performance liquid chromatography analysis of the antioxidant activity of phenolic compounds in green and black tea. Molecular Nutrition and Food Research 49:52-60 PubMed (15602765)
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
6.23 mg/100 ml
|
Black tea infusion |
no |
1 |
Ding Z., Kuhr S., Engelhardt U.H. (1992) Influence of catechins and theaflavins on the astringent taste of black tea brews. Zeitschrift fuer Lebensmittel Untersuchung und Forschung 195:108-111
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
1.90 mg/100 ml
|
Black tea infusion 1 - China - Feinster Tippy-Yunnan |
no |
1 |
|
0.20 mg/100 ml
|
Black tea infusion 2 - China - Darjeeling first flush |
no |
1 |
|
0.50 mg/100 ml
|
Black tea infusion 3 - China - Darjeeling second flush |
no |
1 |
|
0.40 mg/100 ml
|
Black tea infusion 4 - China - Darjeeling autumnal |
no |
1 |
|
3.20 mg/100 ml
|
Black tea infusion 5 - China - Assam broken |
no |
1 |
|
2.80 mg/100 ml
|
Black tea infusion 6 - China - Assam leaf |
no |
1 |
|
1.40 mg/100 ml
|
Black tea infusion 7 - China - Ceylon Lowgrown |
no |
1 |
|
0.90 mg/100 ml
|
Black tea infusion 8 - China - Ceylon Uva Highland |
no |
1 |
|
2.40 mg/100 ml
|
Black tea infusion 9 - China - Kenya |
no |
1 |
|
2.90 mg/100 ml
|
Black tea infusion 10 - China - China black tea |
no |
1 |
|
2.90 mg/100 ml
|
Black tea infusion 11 - China - China black tea |
no |
1 |
|
2.50 mg/100 ml
|
Black tea infusion 12 - China - China black tea |
no |
1 |
|
1.50 mg/100 ml
|
Black tea infusion 13 - China - China black tea |
no |
1 |
|
1.50 mg/100 ml
|
Black tea infusion 14 - China - China black tea |
no |
1 |
|
2.00 mg/100 ml
|
Black tea infusion 15 - China - China black tea |
no |
1 |