DIN EN ISO 23470:2011
土壤質量.有效陽離子交換量(CEC)和可交換陽離子含量的測定.三氯化六氨合高鈷溶液測定法(ISO 23470-2007);德文版本EN ISO 23470-2011
Soil quality - Determination of effective cation exchange capacity (CEC) and exchangeable cations using a hexamminecobalt trichloride solution (ISO 23470:2007); German version EN ISO 23470:2011