A Critical Evaluation of Single Extractions from the SMT Program to Determine Trace Element Mobility in Sediments

Table 1

Examples of different types of extractions with EDTA salts applied to soils and sediments.

Extractant	Applied to	t	L/S	[conc]	Metals analyzed	Reference
(NH4)4-EDTA	Sediments	1 h		10 mmol/L		[38]
Na2H2-EDTA	Soils	2 h	5	10 mmol/L	Cd, Zn, Pb, Cu, and Ni	[37]
Na2H2-EDTA; Na4-EDTA	Calcareous soils	22 h	10	250 mmol/L	Cd, Pb, Zn, and As	[39]
H4-EDTA	Urban soils	24 h	5	68.4, 13.7 and 27.4 mmol/L	Cd, Pb, Zn, and Cu	[41]
Na2Ca-EDTA	Calcareous soils				Pb	[42]