A simplified protocol to determine total fluoride concentration in NaF/silica-based toothpastes
Braz. j. oral sci
;
19: e201689, jan.-dez. 2020. ilus
Article
in English
| BBO, LILACS
| ID: biblio-1152215
ABSTRACT
Aim:
To determine total fluoride (TF) concentration in Na2FPO3/Ca-based toothpastes, using fluoride ion selective electrode (F-ISE) by the direct technique, it is necessary to use acid (Ac+) to hydrolyze the FPO32- ion and to dissolve insoluble fluoride salts bound to the abrasive. For NaF/silica-based toothpastes, the use of acid is not necessary (Ac-) and a simplified protocol could be followed.Methods:
Thus, we evaluated TF concentration in seven brands of NaF/silica-based toothpastes, following the validated conventional Cury's protocol (Ac+) or a simplification of this protocol (Ac-).Fluoride was analyzed with ISE calibrated with fluoride standard solutions prepared in the same conditions as the samples (Ac+ or Ac-).Results:
The mean (±SD; n=21) of TF concentrations (µg F/g) found by Ac+ (971.3±191.2) and Ac- (982.4±201.3) protocols were not statistically different (t test, p=0.22). The TF concentrations found agree with those declared by the manufacturers, except for one toothpaste imported from China.Conclusion:
The findings suggest that the determination of fluoride in NaF/silica-based toothpastes can be accurately made using a simplified protocol ofanalysis:
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Silicic Acid
/
Toothpastes
/
Ion-Selective Electrodes
/
Dentifrices
/
Fluorides
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2020
Type:
Article
Affiliation country:
Brazil
/
Peru
Institution/Affiliation country:
Universidad Peruana Cayetano Heredia/PE
/
University of Campinas/BR
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