フッ素イオン電極法の衛生学的応用(F Series 13) : 第2報生物試料および土壌の分析

概要

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Non-ashing measurement of fluoride in biological samples is recently being developed by using the fluoride electrode. Analytical results of dental enamel and ashed bone are compared in Table 1 by the direct electrode method and the La-Alizarin Complexon solvent extraction method combined with the micro-diffusion technique. There were no differences between the values determined by two methods.Fish-meal was analyzed for fluoride, omitting the standard procedure of ashing and distillation. The optimal pH of acid for fluoride extraction was lower than pH 1.2.Table 4 and 5 show the results of analyses of mineralized tissues and soil performed by ashing and without ashing. The ashed materials always revealed higher values than the non-ashed one. The difference was minor in enamel but considerably large in dentine. In soil, the water extractable fluoride was only 12;-14; of total fluoride found after ashing.
日本衛生学会の論文