Safety of Potato Consumption in Slovak Region Contaminated by Heavy Metals due to Previous Mining Activity

Table 2

Contents of heavy metals in soil determined in different soil extracts.

Locality		aqua regia			NH4NO3
		Cd	Pb	Ni	Cd	Pb	Ni
		(mg/kg)			(mg/kg)
Odorin	Min.	0.94	17.00	30.80	0.026	0.080	0.140
	Max.	1.35	24.40	50.00	0.047	0.205	0.395
	Average	1.19	19.88	39.53	0.033	0.148	0.223
	STDEV	0.13	1.66	4.33	0.006	0.032	0.059
Matejovce	Min.	1.16	17.40	33.00	0.004	0.023	0.019
	Max.	1.56	25.40	71.00	0.055	0.295	0.380
	Average	1.34	21.84	52.59	0.045	0.227	0.228
	STDEV	0.12	1.69	9.01	0.012	0.035	0.066
Spissky; Stvrtok	Min.	1.00	17.60	37.40	0.023	0.090	0.105
	Max.	1.44	26.80	51.20	0.047	0.210	0.475
	Average	1.21	20.44	45.95	0.034	0.149	0.241
	STDEV	0.12	2.17	3.37	0.007	0.030	0.072
Limit value		0.4	70.0	50.0
Critical value					0.1	0.1	1.5