simplified protocol to determine total fluoride concentration in NaF/ silica-based toothpastes
| Autor: | Ailín Cabrera-Matta, Jaime Aparecido Cury, Carlos Liñán-Durán, Cínthia Pereira Machado Tabchoury, Jenniffer Quiroz-Torres, Antônio P. Ricomini-Filho |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.product_category
Standard solution Fluorides 03 medical and health sciences chemistry.chemical_compound Hydrolysis 0302 clinical medicine Silicic acid Ion-selective electrodes Dentifrice General Dentistry Dentifrices 030505 public health Toothpaste Fluoride ion selective electrode RK1-715 030206 dentistry Direct Technique chemistry Dentistry 0305 other medical science business Fluoride Toothpastes Nuclear chemistry |
| Zdroj: | Brazilian Journal of Oral Sciences, Vol 19 (2020) |
| ISSN: | 1677-3225 |
| DOI: | 10.20396/bjos.v19i0.8661689 |
| Popis: | 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 FPO3 2- ion and to dissolve insoluble fluoride salts bound to the abrasive. For NaF/silicabased 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/silicabased 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. |
| Databáze: | OpenAIRE |
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