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J Dent Res 51(3): 807-811, 1972
© 1972 International and American Associations for Dental Research
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Quantitative Analysis of Mg, Na, Cl, Al, and Ca in Human Dental Calculus by Neutron Activation Analysis and High Resolution Gamma-Spectrometry

D. H. RETIEF 1, P. E. CLEATON-JONES 1, J. TURKSTRA 1, H. J. SMIT 1, and P. J. PRETORIUS 1

1 Dental Research Unit of the University of the Witwatersrand and the South African Medical Research Council, Johannesburg, South Africa and Atomic Energy Board, Pretoria, South Africa

The concentrations of magnesium, sodium, chlorine, aluminum, and calcium in pooled human dental calculus dried to constant weight at 105 C were determined by instrumental neutron activation analysis. Their mean concentrations were 0.50 ± 0.04%, 0.37 ± 0.03%, 0.09 ± 0.01%, 96.08 ± 14.63 ppm, and 28.04 ± 1.70%, respectively.

Submitted on June 8, 1971






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