Table 1: Examples of different types of extractions with EDTA salts applied to soils and sediments.

ExtractantApplied totL/S[conc]Metals analyzedReference

(NH4)4-EDTASediments1 h10 mmol/L[38]

Na2H2-EDTASoils2 h510 mmol/LCd, Zn, Pb, Cu, and Ni[37]

Na2H2-EDTA
Na4-EDTA
Calcareous soils22 h10250 mmol/LCd, Pb, Zn, and As[39]

H4-EDTAUrban soils24 h568.4, 13.7 and 27.4 mmol/LCd, Pb, Zn, and Cu[41]

Na2Ca-EDTACalcareous soilsPb[42]