Table 6.

Chemical composition of hydroxyapatite and zinc-doped hydroxyapatite by XRF

Sample	Ca (wt%)	Zn (wt%)	P (wt%)	Zn: (Ca + Zn) (wt%)	Ca: P (wt%)	(Ca + Zn): P (wt%)	Ca: (P + Zn) (wt%)	Zn: (P + Zn) (wt%)
Hydroxyapatite	73.940	0	26.060	0	2.83	2.83	2.83	0
2% Zinc-doped hydroxyapatite	72.230	0.533	27.237	0.00732	2.65	2.67	2.60	0.019
3% Zinc-doped hydroxyapatite	71.919	0.611	27.470	0.00842	2.61	2.64	2.56	0.021
4% Zinc-doped hydroxyapatite	69.229	0.921	29.850	0.01312	2.31	2.35	2.24	0.029
5% Zinc-doped hydroxyapatite	68.370	1.300	30.330	0.01865	2.25	2.29	2.16	0.041