Table 6 The determination of fluoride-ions concentration and activity by the method of standard addition and modified method
Label | pH | Dilution | F−, mol/L × 10−3 | |||
|---|---|---|---|---|---|---|
Method of standard addition | Modified method | |||||
c (F−) | a (F−) | c (F−) | a (F−) | |||
Colgate Total Plax Classic mint | 7.15 | – | 9.77 | 5.52 | 9.92 | 5.43 |
1÷10 | 0.75 | 0.89 | 1.11 | 1.06 | ||
Colgate Total Plax Gentle mint | 5.70 | – | 9.14 | 8.05 | 8.91 | 8.71 |
1÷10 | 1.22 | 0.75 | 1.19 | 1.20 | ||
Colgate Total Plax Fresh mint | 5.95 | – | 9.87 | 9.81 | 9.39 | 8.92 |
1÷10 | 0.63 | 0.47 | 0.70 | 0.43 | ||
Oral B Advantage | 5.70 | – | 17.23 | 15.81 | 25.91 | 15.52 |
1÷10 | 1.42 | 1.21 | 1.2 | 0.98 | ||
Oral B Advantagea | 5.75 | – | 16.70 | 12.30 | 16.81 | 6.08 |
Reach Fresh mint | 5.80 | – | 15.86 | 14.56 | 24.09 | 13.71 |
1÷10 | 1.20 | 0.71 | 1.40 | 1.02 | ||
Reach Fresh minta | 5.75 | – | 18.15 | 16.10 | 26.90 | 14.20 |
Foramen | 5.80 | – | 14.62 | 9.11 | 20.05 | 9.05 |
1÷10 | 0.75 | 0.94 | 1.20 | 1.07 | ||
Lacalut sensitive | 4.40 | – | 5.48 | 5.13 | 8.60 | 4.20 |
1÷10 | 0.758 | 0.77 | 0.15 | 0.86 | ||
Sensodyne | 5.70 | – | 16.25 | 12.53 | 23.59 | 11.12 |
1÷10 | 2.01 | 1.27 | – | – | ||
Vesna F | 6.05 | – | 4.49 | 2.76 | 5.20 | 2.71 |
Lacalut Fresh | 4.20 | – | – | 0.093 | 1.30 | 0.095 |
1÷10 | – | 0.012 | 0.14 | 0.012 | ||