Abstract
The objective of this study is to present a simple method of statistical calculation that allowed us to determine the relationship between the different data obtained from the characterization of the synthetic carbonated apatites containing sodium, in order to find the fundamental substitution mechanism(s) for incorporation of Na+ and CO32- and to establish the general formula. For that, a series of hydroxyapatites containing carbonate and sodium (Na-CO3HAps) has been obtained by the precipitation method. All the compounds were characterized by infrared spectra (IR), powder X-ray diffraction (PXRD) and elemental analysis. The statistical treatment of the experiment result allows us to determine the relationship between one variable and the change in the other and to found the fundamental substitution mechanism(s) for incorporation of Na+ and CO32- . Analysis of variance (ANOVA) allows us to test the models proposed.
Highlights
Carbonated calcium hydroxyapatite containing sodium and/or potassium, magnesium etc. is the most important mineral compound in human dental, enamel and bone [1] [2]
infrared spectra (IR) analyses of the samples show the effect of increasing CO32− and Na+ on the spectral properties of apatites
Increasing CO32− and Na+ contents caused increasing of the intensities of the CO32− absorption bands at 1420 - 1460 cm‒1 (ν3 C‒O) and 872 cm‒1 (ν2 C‒O) and decreasing in the resolution of PO34− (ν3 P‒OH) absorption band at 1032 cm−1, The shoulder observed at 740 cm‒1 is attributed to the νL mode of OH‒ close neighbors to Na+ ions [13]
Summary
Carbonated calcium hydroxyapatite containing sodium and/or potassium, magnesium etc. is the most important mineral compound in human dental, enamel and bone [1] [2]. Carbonated calcium hydroxyapatite containing sodium and/or potassium, magnesium etc. We can found this type of apatite in sedimen-. (2014) Statistical Studies of the Physicochemical Analytic Results of a Series of Synthetic Calcium Hydroxyapatite Containing Carbonate and Sodium. American Journal of Analytical Chemistry, 5, 343-357. Khattech tary phosphate apatite [3]. These materials have necessitated studies of the effects of ions, such as CO32− Na+, Mg2+, on the physicochemical properties and especially the mode of CO32− Na+ incorporation in apatite structure. The complexity of biological and sedimentary phosphates apatite has returned these studies very difficultly
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