Instrumental neutron activation analysis for coal

Abstract

Concentrations of 54 elements in coal samples were determined by instrumental neutron activation analysis(INAA). Coal samples indigenous to Japan, Australia and U.S.A. (c.a. 50, 1000 mg) were irradiated by neutrons for short time (5 min) and long time (5 h) in Musashi Institute of Technology Research Reactor (MITRR). Various methods of neutron irradiation and of gamma-ray spectrometry were used in order to improve the detection sensitivity. Samples were irradiated by three methods, namely, no-filter, cadmiumfilter and boron-filter irradiations. Gamma-ray spectra of irradiated samples were collected by four methods, namely, spectrometry using a coaxial Ge(Li) detector, anticoincidence and coincidence counting spectrometries using a coaxial Ge(Li) detector and a well-type NaI(Tl) detector, and low energy photon spectrometry using a planer Ge detector (LEPS). © 1985, The Japan Society for Analytical Chemistry. All rights reserved.