本文件规定了一种使用六氯化铵（III）溶液作为萃取剂测定土壤中阳离子交换容量（CEC）和交换性阳离子（铝、钙、铁、钾、镁、锰、钠）含量的方法。对于含有碳酸钙的土壤，特别规定了方解石饱和六氯化铵（III）溶液，用于测定交换性钙。本文件适用于根据ISO 11464制备的所有类型的风干土壤样品。

This document specifies a method for the determination of cation exchange capacity (CEC) and the content of exchangeable cations (Al, Ca, Fe, K, Mg Mn, Na) in soils using a hexamminecobalt(III)chloride solution as extractant. For soils containing calcium carbonate a calcite saturated hexamminecobalt(III)chloride solution is specified particularly for determination of exchangeable Ca. This document is applicable to all types of air-dry soil samples which have been prepared according to ISO 11464.