A rapid method is presented for the simultaneous determinations of thorium, niobium, lead, and zinc in lateritic material from Cerro Impacto, Estado Bolívar, Venezuela. This technique uses a PDP—11/05 processor—based photon induced x-ray fluorescence system. The total variations of approximately 5% for concentrations of approximately 1 and 10% for concentrations of approximately 0.1% were obtained with only 500 s of fluorescent time. The values obtained by this method were in agreement with values measured by conventional flame atomic absorption spectroscopy for lead and zinc. The values for thorium measured were in agreement with the reported values for the reference materials supplied by NBL.
JefferyP. G., Chemical Methods of Rock Analysis, (Pergamon, New York, 1975), 2nd Ed.
2.
KirbrightG. F. and SargentM., Atomic Absorption Spectroscopy and Fluorescence Spectroscopy (Academic Press, New York, 1974).
3.
BowmanJ. A. and WillisJ. B., Anal. Chem.30, 1210 (1967).
4.
BertinE. P., Principles and Practice of X-ray Spectrometry Analysis, (Plenum Press, New York, 1975), 2nd Ed.
5.
LaBrecqueJ. J., Int. J. Appl. Radiat. Isotope.29, 661 (1978).
6.
LaBrecqueJ. J., J. Radioanal. Chem.43, 253 (1978).
7.
LaBrecqueJ. J., J. Radiochem. Radioanal. Lett.31, 1 (1971).
8.
LaBrecqueJ. J., J. Radioanal. Chem.43, 127 (1977).
9.
LaBrecqueJ. J., “The use of a PDP-11/05 Based Data Acquisition and Analysis System (TN-11) for Automated Isotope Analysis and Non-dispersive X-ray Fluorescence analysis in the Petroleum Industry”, Proceeding of the III International Conference on Computer in Chemical Research, Education and Technology, p. 66–81.
