The quantitative analysis of Sr, Au, Br, Mn and Na in normal human enamel and dentine by neutron activation and high resolution gamma spectrometry.

T concentrations of some of the elements in normal human enamel and dentine that give rise to short-lived radioisotopes, Ca, Na, Al, Mg and Cl, were determined by means of instrumen­ tal activation analysis and the results reported in a previous paper (Retief et al, 1970). Subsequently the concentrations of some of the elements that give rise to long-lived radioisotopes, Cr, Ba, Sb, Ag, Zn, Co and Fe were determined by the same instrumentation (Retief et al, 1970). The purpose of the present study was to attempt to analyse quantitatively fur­ ther elements in these tissues.