Evaluation of the Pollution by Toxic Elements around the Small-Scale Mining Area, Boroo, Mongolia

Table 5

Intercomparison of trace element concentrations (mg kg⁻¹) in human hair.

Element	UM	Our study (PIXE)		Japan (PIXE) normal [21]	Mongolia (PIXE) normal [20]	Philippines (PIXE) miners [19]
		Normal (𝑛=20)	Miners (𝑛=25)
Ca	ppm	2096	524–2259	1890	411	383.1–5363
Ti	ppm	80.4	21.8–42.2	10.4	17.6	0–6. 2
Mn	ppm	7.93	1.6–43.1	1.62	9.5	0.1–289.6
Fe	ppm	25.1	52.1–142	29.1	126	10.8–222.1
Ni	ppm	1.7	0.2–4.9	2.05	1.6	0–3.5
Cu	ppm	4.9	3.5–17.9	42.7	13.7	5.6–138.2
Zn	ppm	452	155–293	238	218	55–972.9
As	ppm	1.8	2.1–5.5	0.23	1.3	0–9
Pb	ppm	8	5.4–28.9	37.3	6.6	1.1–87.5
Sr	ppm	3.3	7.5–22.6	6.04	3.9	0