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


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


Other articles in this issue

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


Online (Single user only)
Institution Online (IP address validation)

Back issues may be obtained from the publisher

Consider recommending subscription to your institution's library

You can view Open Access papers without a subscription.