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Table 6 The determination of fluoride-ions concentration and activity by the method of standard addition and modified method

From: Evaluation of free and total fluoride concentration in mouthwashes via measurement with ion-selective electrode

LabelpHDilutionF, mol/L × 10−3
Method of standard additionModified method
c (F)a (F)c (F)a (F)
Colgate Total Plax
Classic mint
7.159.775.529.925.43
 1÷100.750.891.111.06
Colgate Total Plax
Gentle mint
5.709.148.058.918.71
 1÷101.220.751.191.20
Colgate Total Plax
Fresh mint
5.959.879.819.398.92
 1÷100.630.470.700.43
Oral B Advantage5.7017.2315.8125.9115.52
 1÷101.421.211.20.98
Oral B Advantagea5.7516.7012.3016.816.08
Reach Fresh mint5.8015.8614.5624.0913.71
 1÷101.200.711.401.02
Reach Fresh minta5.7518.1516.1026.9014.20
Foramen5.8014.629.1120.059.05
 1÷100.750.941.201.07
Lacalut sensitive4.405.485.138.604.20
 1÷100.7580.770.150.86
Sensodyne5.7016.2512.5323.5911.12
 1÷102.011.27
Vesna F6.054.492.765.202.71
Lacalut Fresh4.200.0931.300.095
 1÷100.0120.140.012
  1. a mouthwash of another batch was used