Evaluation of the direct and diffusion methods for the determination of fluoride content in table salt
Evaluation of the direct and diffusion methods for the determination of fluoride content in table salt
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DOI：
10.1922/cdh_2306martinez-mier07
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发表时间：
2009-12-01
影响因子：
1.7
通讯作者：
Zero, D. T.
中科院分区：
文献类型：
--
作者：
Martinez-Mier, E. A.;Soto-Rojas, A. E.;Zero, D. T.
本研究的目的是评估目前用于分析氟化盐的方法，以确定这种类型的分析最有用的方法。基础研究设计：获得75个氟化盐样品。使用直接法和扩散法分析样品的氟化物含量，有和没有预处理。还对选定的样品进行了元素分析。将氟化物添加到超纯NaCl和非氟化商业盐样品中，并将Ca和Mg添加到氟化物样品中，以使用对方法的修改来评估氟化物回收率。结果：扩散法比直接法发现和回收了更大量的氟化物（扩散法为96%-100%，直接法为67%-90%）。使用不同的离子强度调节剂的直接和扩散方法之间的统计学显着差异。预处理方法减少了回收的氟化物的量。氟化物含量的测定受到盐中氯化钠和其他离子存在的影响。结论：直接法和扩散法是氟盐分析的适宜方法。方法的选择应取决于分析的目的。
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.