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Table 5 The accuracy of measurement of F in NaF standard solutions prepared using Albavit solution (4 ml «Alba» + 1 ml NaF)

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

c (NaF), mol/L

EMF

+  5 ml TISAB

+  10 ml TISAB

V (NaF) added, ml

с (F) theoretical

с (F) actual

c̄ (F)

0.5

532.2

505.3

486.9

1.0

0.100

0.104

0.105 ± 0.002

0.5

536.7

509.7

490.8

1.0

0.100

0.106

0.5

534.2

507.2

489.8

1.0

0.100

0.105

0.1

501.3

469.5

450.8

1.0

0.020

0.022

0.022 ± 0.0005