Case Study of the Relationship between Aqua Regia and Real Total Contents of Harmful Trace Elements in Some European Soils

Table 3

Median values of degree of extractability of aqua regia contents to real totals.

El.	MIN	MAX	MEDIAN	MEDIAN*	El.	MIN	MAX	MEDIAN	MEDIAN*
Ag*	37.1	98.6	75.7	53.6	Mn	58.2	95.5	89.4	88.6
As	72.5	89.4	82.4	82.4	Mo	56.5	93.9	82.0	82.0
B	18.3	63.0	39.6	45.9	Ni	69.1	105	88.4	88.4
Ba	5.05	66.1	21.9	20.5	Pb	65.7	90.5	78.8	78.7
Be	25.0	67.2	51.3	51.2	Sb	36.5	69.4	52.1	53.0
Cd	85.0	109	94.1	93.8	Se *	1.53	144	38.7	34.6
Co	74.2	93.3	85.6	85.9	Sn	33.5	93.4	58.2	56.7
Cr	32.2	90.9	55.9	55.9	U	19.0	63.9	35.4	35.4
Cu	79.2	97.9	90.6	90.6	V	43.0	88.8	60.6	61.0
Hg	89.1	107	96.9	97.6	Zn	79.9	98.3	90.0	89.5

El.: harmful chemical elements. Degree of extractability (%): MIN: minimum value, MAX: maximum value, and MEDIAN: median value before elimination of high leverage and possibly influential points, and MEDIAN*: median value after elimination of the high leverage and possibly influential points. The elements are in bold if the median value of degree of extractability after elimination of the above-mentioned points changed not more than 2%. *: indicates that the statistical parameters of their degree of extractability are not reliable due to a low number of laboratory measurements (Table 1), these parameters are given only for information.