Calculated Mean Content Values
| Units |
Average |
Min |
Max |
Standard Deviation |
| mg/100 g FW |
3.25 |
0.02 |
63.40 |
17.95 |
| mol/100 g |
1.08e-05 |
6.62e-08 |
2.10e-04 |
5.94e-05 |
Values calculated by aggregating data from 20
different samples
from
3 unique
publications.
Aglycone Mean Content Values
| Aglycone |
Units |
Average |
Min |
Max |
Standard Deviation |
| Quercetin |
mg/100 g FW |
3.25 |
0.02 |
63.40 |
17.95 |
| mol/100 g |
1.08e-05 |
6.62e-08 |
2.10e-04 |
5.94e-05 |
Original Content Values Used to Produce Means
Crozier, A., Lean, M.E.J., McDonald, M.S., Black, C. (1997) Quantitative analysis of the flavonoids content of commercial tomatoes, onions, lettuce and celery. Journal of Agricultural and Food Chemistry 45:590-595
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
34.20 mg/100 g FW
|
White onion - None |
no |
1 |
|
33.20 mg/100 g FW
|
White onion - Commercial - 3 Aug 1994 |
no |
1 |
|
18.50 mg/100 g FW
|
White onion - Commercial - 12 Jan 1995 |
no |
1 |
|
63.40 mg/100 g FW
|
White onion - Commercial - 4 Feb 1995 |
no |
1 |
|
33.10 mg/100 g FW
|
White onion - Commercial - 3 April 1995 |
no |
1 |
|
22.70 mg/100 g FW
|
White onion - Commercial - 6 May 1995 |
no |
1 |
Patil B.S., Pike L.M., Kil Sun Y. (1995) Variation in the quercetin content in different colored onions (Allium cepa L.). Journal of the American Society for Horticultural Science 120:909-913
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
0.14 mg/100 g FW
|
White onion - Skinned - 20223G |
no |
5 |
|
0.09 mg/100 g FW
|
White onion - Skinned - 20319G |
no |
5 |
|
0.05 mg/100 g FW
|
White onion - Skinned - 20240G |
no |
5 |
|
0.05 mg/100 g FW
|
White onion - Skinned - Contessa |
no |
5 |
|
0.03 mg/100 g FW
|
White onion - Skinned - 20234G |
no |
5 |
|
0.03 mg/100 g FW
|
White onion - Skinned - 4168 |
no |
5 |
|
0.03 mg/100 g FW
|
White onion - Skinned - 20216G |
no |
5 |
|
0.04 mg/100 g FW
|
White onion - Skinned - 20304G |
no |
5 |
|
0.02 mg/100 g FW
|
White onion - Skinned - 20215G |
no |
5 |
|
0.02 mg/100 g FW
|
White onion - Skinned - 20221G |
no |
5 |
|
0.02 mg/100 g FW
|
White onion - Skinned - 20221G |
no |
5 |
Patil B.S., Pike L.M. (1995) Distribution of quercetin content in different rings of various coloured onion (Allium cepa L.) cultivars. Journal of Horticultural Science and Biotechnology 70:643-650
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
0.16 mg/100 g FW
|
White onion - Contessa - Outermost rings |
no |
1 |
|
0.10 mg/100 g FW
|
White onion - Contessa - Middle rings |
no |
1 |
|
0.06 mg/100 g FW
|
White onion - Contessa - Remaining rings |
no |
1 |