A simplified protocol to determine total fluoride concentration in NaF/silica-based toothpastes
Braz. j. oral sci
;
19: e201689, jan.-dez. 2020. ilus
Artigo
em Inglês
| 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 of analysis
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Ácido Silícico
/
Cremes Dentais
/
Eletrodos Seletivos de Íons
/
Dentifrícios
/
Fluoretos
Idioma:
Inglês
Revista:
Braz. j. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2020
Tipo de documento:
Artigo
País de afiliação:
Brasil
/
Peru
Instituição/País de afiliação:
Universidad Peruana Cayetano Heredia/PE
/
University of Campinas/BR
Similares
MEDLINE
...
LILACS
LIS