BS EN ISO 23470 pdf download Soil quality — Determination of effective cation exchange capacity (CEC) and exchangeable cations using a hexamminecobalt trichloride solution This International Standard is applicable to all types of air-dried soil samples which have been prepared inaccordance with ISO 11464. References and results of the comparison with other methods (barium chloride, ammonium acetate) are givenin Annex...