Table 3.

Trace metals concentration of different age groups in human hair (mg·kg⁻¹).

Age Group	Statistical Analysis	As	Cd	Cr	Cu	Ni	Pb	Zn
Children	Mean	1.13	0.19	0.17	11.43	1.21	10.88	120.70
	SD	0.64	0.07	0.06	2.35	0.36	3.28	29.62
Adults	Mean	0.71	0.13	0.21	11.37	1.21	5.118	162.997
	SD	0.36	0.06	0.13	2.65	0.526	3.020	51.803
Total	Mean	0.77	0.14	0.20	11.38	1.21	5.86	169.46
	SD	0.43	0.06	0.13	2.60	0.51	3.56	57.42

SD: standard deviation.