Table 4.
Percentage decrease of Ferric Reducing Antioxidant Power (FRAP) (converted to mM Fe2+) of peppermint, chamomile and black tea brews prepared with the use of mineral waters relative to the brew prepared with the use of deionized water.
| Peppermint | Camomile | Black Tea | ||||
|---|---|---|---|---|---|---|
| Fe2+ mM |
Difference % |
Fe2+ mM |
Difference % |
Fe2+ mM |
Difference % |
|
| Deionised water | 44.51 ± 2.24 cd 1 | 0.00 | 19.21 ± 0.36 a | 0.00 | 63.67 ± 1.52 de | 0.00 |
| Baby Zdrój | 44.62 ± 2.62 cd | 0.25 | 18.56 ± 0.52 a | −3.38 | 61.30 ± 1.20 e | −3.72 |
| Żywiec | 38.06 ± 3.98 fg | −14.49 | 15.86 ± 1.84 bc | −17.44 | 67.05 ± 0.14 bc | 5.31 |
| Tap water | 40.24 ± 1.15 ef | −9.59 | 19.6 ± 0.17 a | 8.43 | 70.62 ± 1.28 a | 10.92 |
| Cisowianka | 42.58 ± 0.96 de | −4.34 | 16.32 ± 0.34 b | −15.04 | 69.06 ± 1.56 ab | 8.47 |
| Java | 34.77 ± 1.41 g | −21.88 | 16.10 ±0.93 b | −16.19 | 69.55± 1.06 ab | 9.24 |
| Wielka pieniawa | 50.29 ± 2.84 b | 12.99 | 16.07 ± 0.71 b | −16.35 | 69.79 ± 3.79 ab | 9.61 |
| Muszynianka | 54.79 ± 2.90 a | 23.10 | 15.63 ± 0.51 bc | −18.64 | 70.17 ± 0.55 a | 10.21 |
| Staropolanka | 47.24 ± 1.87 bc | 6.13 | 16.68 ± 0.61 b | −13.17 | 67.72 ± 0.84 abc | 6.36 |
| Wysowianka | 40.95 ± 01.90 ef | −8.00 | 14.37 ± 0.71 c | −25.20 | 65.92 ± 1.98 cd | 3.53 |
1 Data are shown as mean ± SD. Different letters (a, b, c, etc.) show a significant difference with p < 0.05. The differences relate to each group of brews separately.