For the determination of calcium, magnesium
and sodium with atomic absorption spectroscopy (AAS),
fluoride with ion-selective potentiometry, and phosphate with
ultraviolet (UV) spectroscopy, about 100 mg powder of dentin
and enameloid were used after dissolution in hydrochloric acid.
For fluoride analysis we used ion-selective potentiometry
(ion-selective electrode, ISE; pH/ION 735, WTW; measurement
performed by Analytische Laboratorien GmbH, Lindlar, Germany).