Table 2.
The determined fluoride and aluminium concentrations in tea infusions using calibration curve technique and the price of the tea.
| Symbol, Trade Name, Origin 1 | n 2 | C(F–) (mg/L) 3 | C(Al) (mg/L) 3 | Price (EUR/100 g) |
|---|---|---|---|---|
| Black filter (BF) tea | ||||
| BF1, English Breakfast, N/A 4 | 3 | 4.05 ± 0.03 | 6.21 ± 0.20 | 6.10 |
| BF2, English Breakfast, N/A | 2 | 2.71 ± 0.04 | 3.83 ± 0.02 | 5.00 |
| BF3, English Breakfast Supreme, N/A | 2 | 3.47 ± 0.15 | 7.51 ± 0.25 | 5.28 |
| BF4, Gold, N/A | 2 | 3.39 ± 0.05 | 6.56 ± 0.23 | 3.38 |
| BF5, Prince of Wales, N/A | 2 | 2.81 ± 0.19 | 6.25 ± 0.28 | 6.74 |
| BF6, English Tea No.1, N/A | 2 | 1.95 ± 0.03 | 3.93 ± 0.06 | 5.00 |
| BF7, Earl Grey, N/A | 2 | 4.15 ± 0.07 | 7.38 ± 0.18 | 6.38 |
| BF8, Earl Grey, N/A | 2 | 3.99 ± 0.17 | 8.11 ± 0.28 | 4.09 |
| BF9, Earl Grey Royal, N/A | 2 | 4.79 ± 0.07 | 8.90 ± 0.05 | 4.91 |
| BF10, Irish Cream, N/A | 2 | 4.26 ± 0.03 | 7.53 ± 0.30 | 4.76 |
| Black loose (BL) tea | ||||
| BL1, English Breakfast, India | 2 | 1.12 ± 0.07 | 2.65 ± 0.11 | 3.29 |
| BL2, Irish Morning, Sri Lanka | 2 | 0.88 ± 0.01 | 2.63 ± 0.16 | 3.65 |
| BL3, Earl Grey Decaffeine, Sri Lanka | 2 | 0.76 ± 0.03 | 1.25 ± 0.01 | 4.20 |
| BL4, Earl Grey Superior, India | 2 | 0.86 ± 0.04 | 1.80 ± 0.02 | 4.20 |
| BL5, Earl Grey, Sri Lanka | 3 | 0.96 ± 0.03 | 1.79 ± 0.05 | 3.65 |
| BL6, Keemun, China | 2 | 1.05 ± 0.07 | 1.59 ± 0.03 | 3.11 |
| BL7, Yunnan, China | 2 | 0.97 ± 0.08 | 1.63 ± 0.16 | 3.65 |
| BL8, Ceylon OP1 Kenilworth, Sri Lanka | 2 | 0.55 ± 0.01 | 1.41 ± 0.02 | 3.65 |
| BL9, Assam TGFOP1 Dirial, India | 2 | 0.54 ± 0.01 | 1.31 ± 0.01 | 3.65 |
| BL10, Darjeeling TGFOP1, India | 2 | 0.58 ± 0.01 | 1.29 ± 0.02 | 4.57 |
| BL11, Bio Black Tea Darjeeling Premium, India | 2 | 1.06 ± 0.02 | 1.80 ± 0.09 | 4.21 |
| Green filter (GF) tea | ||||
| GF1, Green Tea, N/A | 2 | 2.77 ± 0.07 | 6.58 ± 0.18 | 3.86 |
| GF2, Green Tea, N/A | 3 | 3.08 ± 0.02 | 7.48 ± 0.12 | 5.00 |
| GF3, Green Tea Superior, N/A | 2 | 2.76 ± 0.09 | 6.10 ± 0.06 | 5.20 |
| GF4, Green Tea, N/A | 2 | 2.90 ± 0.05 | 3.95 ± 0.05 | 2.00 |
| GF5, Green Tea, N/A | 2 | 2.95 ± 0.06 | 6.13 ± 0.09 | 3.78 |
| Green loose (GL) tea | ||||
| GL1, Kukicha Organic, Japan | 2 | 0.34 ± 0.01 | 0.78 ± 0.01 | 6.21 |
| GL2, Sencha Yamato, Japan | 2 | 0.86 ± 0.01 | 0.93 ± 0.02 | 5.48 |
| GL3, Yunnan Green, China | 3 | 0.71 ± 0.02 | 1.48 ± 0.07 | 4.38 |
| GL4, Earl Green, China | 2 | 1.43 ± 0.05 | 1.79 ± 0.01 | 3.65 |
| GL5, China Gunpowder Temple of Heaven, China | 2 | 0.82 ± 0.03 | 2.43 ± 0.01 | 3.11 |
| GL6, Jade Dragon Wings Organic, China | 2 | 1.29 ± 0.03 | 2.23 ± 0.10 | 3.84 |
| GL7, Korea Mystic Green Organic, South Korea | 2 | 0.96 ± 0.01 | 3.74 ± 0.19 | 4.02 |
| GL8, Premium Shincha Gyokuro Okumidori Kirishima 2021, Japan | 2 | 0.67 ± 0.03 | 0.51 ± 0.01 | 20.09 |
| GL9, Genmaicha, Japan | 2 | 0.57 ± 0.02 | 1.31 ± 0.08 | 3.65 |
1 Teas brand names can be found in Appendix B. 2 Number of measurements. 3 Values are averages ± standard deviation (SD). 4 N/A—not available.