Evaluation of acid diffusion and fluoride selective electrode to measure the total fluoride in toothpastes.
- Author:
Xiao-ling WANG
1
;
Chuo-yue CHENG
;
Yao GE
;
Qin WANG
Author Information
- Publication Type:Journal Article
- MeSH: Calcium; Electrodes; Fluorides; Phosphates; Reproducibility of Results; Sodium Fluoride; Toothpastes
- From: West China Journal of Stomatology 2006;24(5):438-440
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo evaluate the reliability of a method of measuring the total fluoride in fluoride-containing toothpastes with acid diffusion and fluoride selective electrode.
METHODSFour brands of commercially available non-fluoride toothpastes and fluoride-containing toothpastes were sampled. Fluoride was extracted from the toothpastes in 2 mol/L HC10(4) at room temperature overnight and then subjected to the measurement with fluoride electrode.
RESULTSFluoride recovery of the non-fluoride toothpastes containing calcium as abrasive by this method was 99.5%-100.5%, more than 94% of total fluoride was measured from the marketed fluoride toothpastes, and the variation coefficient of this method was less than 1.54%. While the abrasive was silicon, the fluoride recovery of the non-fluoride toothpastes was 83.4%, and 89.7% of total fluoride was measured from the marketed fluoride-containing toothpastes.
CONCLUSIONThe amount of total fluoride in the calcium containing toothpaste can be detected simply and accurately measured by acid diffusion and fluoride selective electrode.