December 2009

Volume 26, Issue 4

Evaluation of the direct and diffusion methods for the determination of fluoride content in table salt

Authors: E.A. Martínez-Mier A.E. Soto-Rojas C.M. Buckley J. Margineda D.T. Zero
doi: 10.1922/CDH_2306Martínez-Mier07

Abstract

Objective: The aim of this study was to assess methods currently used for analyzing fluoridated salt in order to identify the most useful method for this type of analysis. Basic research design: Seventy-five fluoridated salt samples were obtained. Samples were analyzed for fluoride content, with and without pretreatment, using direct and diffusion methods. Element analysis was also conducted in selected samples. Fluoride was added to ultra pure NaCl and non-fluoridated commercial salt samples and Ca and Mg were added to fluoride samples in order to assess fluoride recoveries using modifications to the methods. Results: Larger amounts of fluoride were found and recovered using diffusion than direct methods (96%-100% for diffusion vs. 67%-90% for direct). Statistically significant differences were obtained between direct and diffusion methods using different ion strength adjusters. Pretreatment methods reduced the amount of recovered fluoride. Determination of fluoride content was influenced both by the presence of NaCl and other ions in the salt. Conclusion: Direct and diffusion techniques for analysis of fluoridated salt are suitable methods for fluoride analysis. The choice of method should depend on the purpose of the analysis. Key Words: Fluoride, fluoride analysis, salt

£10 single article

Other articles in this issue

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Editorial - Beyond water fluoridation; the emergence of functional foods for oral health 194-195 £10 single article
Book Review 196-196 £10 single article
Sense of coherence associates with oral and general health behaviours 197-203 £10 single article
Evaluation of the direct and diffusion methods for the determination of fluoride content in table salt 204-210 £10 single article
Fluoride toothpaste utilization behaviour among preschool children in Perlis, Malaysia 211-215 £10 single article
Rural Mexican immigrant parents’ interpretation of children’s dental symptoms and decisions to seek treatment 216-221 £10 single article
Assessment of HIV/AIDS awareness among 500 patients referred to the Ankara University Faculty of Dentistry 222-226 £10 single article
Professional charges not reimbursed to dentists in the US: evidence from Medical Expenditure Panel Survey, 1996. 227-233 £10 single article
Quality of life in patients with dental conditions: comparing patients’ and providers’ evaluation 234-238 £10 single article
Understanding politics? Some lessons from Swedish dentistry. 239-243 £10 single article
Factors influencing the need for dental care amongst the elderly in the Republic of Ireland 244-249 £10 single article
The periodontal health of Nepalese schoolchildren 250-256 £10 single article

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