Exchange capacity (soils)
Quality
Soils
Spectrophotometry
Cations
Cobalt
Determination of content
Chemical analysis and testing
Extraction methods of analysis
Ion-exchange methods
Soil testing
Link: BS EN ISO 23470:2018 Soil quality. Determination of effective cation exchange capacity (CEC) and exchangeable cations using a hexamminecobalt trichloride solution
Source: BSI Standards

