Rare earth elements and lead concentration in hair of 95 children (μg/g).

Table 3: Rare earth elements and lead concentration in hair of 95 children (μg/g).

Elements	$\bar{x}$	s	M	*P₂₅*	*P₇₅*
La	1.3465	3.4205	0.3907	0.2399	1.1505
Ce	1.8336	4.3124	0.5958	0.3811	1.6591
Pr	0.1393	0.2900	0.0489	0.0337	0.0337
Nd	0.4052	0.7594	0.1646	0.1098	0.3574
Sm	0.0395	0.0527	0.0226	0.0150	0.0364
Eu	0.0090	0.0105	0.0060	0.0042	0.0097
Gd	0.0265	0.0336	0.0184	0.0118	0.0296
Tb	0.0028	0.0043	0.0020	0.0009	0.0030
Dy	0.0149	0.0217	0.0112	0.0066	0.0151
Ho	0.0028	0.0041	0.0020	0.0012	0.0027
Er	0.0073	0.0110	0.0051	0.0028	0.0071
Tm	0.0013	0.0019	0.0009	0.0005	0.0015
Yb	0.0066	0.0088	0.0049	0.0030	0.0064
Lu	0.0010	0.0017	0.0006	0.0003	0.0010
Y	0.0679	0.0969	0.0497	0.0312	0.0672
Pb	26.2245	71.1515	12.3451	6.5210	25.1090

Note: Concentration of all above elements did not distribute as normal.