This standard is formulated for the purposes of enforcing the Environment Protection Law of the People’s Republic of China, protecting the environment, safeguarding the human health, and setting standards for the determination of cation exchange capacity (CEC) in soil. This standard specifies the hexamminecobalt trichloride solution-spectrophotometric method used to determine cation exchange capacity in soil. This standard is the original version.

 Soil quality-Determination of cation exchange capacity (CEC)-Hexamminecobalt trichloride solution-Spectrophotometric method (HJ 889-2017)