アブストラクト（22巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Studies on the Determination of Strontium in Human Tooth Enamel Using Nitrous Oxide-Acetylened Emission Spectrophotometry
Subtitle　： ORIGINAL ARTICLES
Authors　： Sumio Suzuki, Yukio Hirata
Authors（kana）　：
Organization　： Department of Dental Health and Public Health, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 22
Number　： 2
Page　： 61-70
Year/Month　： 1994 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] Strontium is considered as one of the important trace elements which make up human tooth and bone. According to earlier reports, strontium levels in tooth enamel varied widely from 14 to 1,200 ppm due to the interference of coexisting chemical substances. Thus, the method of determination of strontium in teeth has not yet been established. Therefore, in the present study, a reliable determination method for strontium within human enamel was conducted using a nitrous oxide-acetylened emission spectrophotometry with an atomic absorption/flame spectrometer. Strontium is quite an interesting element in connection with the prevention of dental caries and in the possible incidence of mottled enamel. It was found that the nitrous oxide-acetylened emission spectrophotometry exhibited a remarkably higher sensitivity than nitrous oxide-acetylened atomic absorption spectrophotometry. For the purpose of correct determination, a sample volume of greater than 10 mg of was required, and the addition of potassium at 250 ppm to the sample solution was needed to inhibit the interferences caused by ionization of some of the strontium atoms. A high recovery rate on an average 97.2% can be obtained using the techniques developed in the present study. Under these technical conditions, it was also found that strontium level in human molar tooth enamel was around 228 ppm. The conclusion reached from these experiments was that in measuring the strontium levels in human tooth using the standard addition method, a good result can be obtained by employing the nitrous oxide-acetylened emission spectrophotometry by setting the enamel volume at around 10 mg and potassium concentration at 250 ppm.
Practice　： Dentistry
Keywords　： Strontium in Tooth, Trace Element, Determination Method, N2O-C2H2Emission Spectrophotometry, Standard Addition Method