ISO 23470:2007 Soil quality - Determination of effective cation exchange capacity (CEC) and exchangeable cations using a hexamminecobalt trichloride solution
This International Standard specifies a method for the determination of the cation exchange capacity (CEC)
and the content of exchangeable cations (Al3+, Ca2+, Fe2+, K+, Mg2+, Mn2+, Na+) in soils using a
hexamminecobalt trichloride solution as extractant.
NOTE As the pH of a soil suspension in the hexamminecobalt trichloride solution is close to the pH of the suspension
in water, this method is considered to give the effective CEC, i.e. the CEC at the soil pH.
This International Standard is applicable to all types of air-dried soil samples which have been prepared in
accordance with ISO 11464.
References and results of the comparison with other methods (barium chloride, ammonium acetate) are given
in Annex A.
ISO 23470:2007 history
2018ISO 23470:2018 Soil quality - Determination of effective cation exchange capacity (CEC) and exchangeable cations using a hexamminecobalt(III)chloride solution
2007ISO 23470:2007 Soil quality - Determination of effective cation exchange capacity (CEC) and exchangeable cations using a hexamminecobalt trichloride solution