XRF detection limits for dental tissues of human teeth

The concentrations of some trace element constituents and also some minor- and macroelements in several tooth samples have been measured using X-ray fluorescence (XRF). The incorporation of trace elements into tooth matrix by measuring their concentrations in thick targets of teeth cross-sectioned along the median plane using for enamel, dentine, and cementum for analysis was investigated. The teeth and teeth tissues were irradiated with the 109 Cd source ðE Ka ¼ 22:16 keVÞ and 241 Am source (Eg ¼ 59.57 keV) and measured by an X-ray fluorescence detection system with a Si(Li) detector of 200 eV resolution ðMnKa —5 :9 keVÞ. The elements as K, Ca, Ti, Cr, Mn, Fe, Cu, Zn, Bi(Pb), Se, Br employing the 109 Cd source and elements as Rb, Sr, Y, Zr, Nb, Mo, In(Cd), Sn, Te, I, Ba, La, Ce, Nd, by the 241 Am source have been determined. The detection limits of the analytical method for different elements are discussed in some detail. Further, the interrelationships of the trace metal concentrations of teeth in relation with their health have been statistically examined.