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Current Pharmaceutical Analysis
ISSN (Print): 1573-4129
ISSN (Online): 1875-676X
VOLUME: 10
ISSUE: 3
DOI: 10.2174/1573412910666140602232739      Price:  $58









Determination of Fluoride in Mouthwash Using Flow-injection Analysis with Spectrophotometric Detection

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Author(s): Benedito Roberto de Alvarenga, Wesley Lira Gabriel, Denílson Mendes de Oliveira, Cesar Reis, Reinaldo Francisco Teofilo, Vagner Bezerra dos Santos and Willian Toito Suarez
Pages 208-214 (7)
Abstract:
In this work, the development of flow system that is simple, precise and accurate for determining fluoride in mouthwash is described. The determination of fluoride was based on the on-line formation of a Fe(III)–salicylate complex, which is consumed in the presence of fluoride, generating the colourless hexafluoroferrate(III) complex ion, [FeF6]3-. The proposed procedure exhibits a linear concentration range of 8.0 × 10-5–1.2 × 10-3 mol L-1, a detection limit of 3.5 x 10-5 mol L-1, a higher sampling frequency of 44 h-1 and relative standard deviations below 0.2%. The interference of the red colour of the samples was removed using waste-seed specimens of Mabea fistulifera Mart. as a biosorbent material.
Graphical Abstract:
Keywords:
Biosorbent material, flow injection analysis, fluoride, hexafluoroferrate(III) complex, mouthwash, spectrophotometry.
Affiliation:
Departamento de Quimica, Universidade Federal de Vicosa - UFV, Centro de Ciencias Exatas e Tecnologia, 36570-900, Viçosa, MG, Brazil.