Showing details for content value of Theaflavin 3'-O-gallate in Tea [Black], infusion

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 2.45e-05 5.71e-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 5.81e-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 Number of Samples Analyzed
12.28 mg/100 ml China black tea 7 no 1
6.08 mg/100 ml China black tea 8 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
4.44 mg/100 ml China black tea 1 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
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

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 Number 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 Number 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
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