ISO 23470:2018
Soil quality — Determination of effective cation exchange capacity (CEC) and exchangeable cations using a hexamminecobalt(III)chloride solution
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.
| Get this standard | Prices exclude GST | |
|---|---|---|
| PDF ( Single user document) |
$240.87 NZD
|
|
| HardCopy |
$277.39 NZD
|
|
| Networkable PDF |
Price varies
|
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Procedure
7.1 Test portion
7.2 Exchange reaction
7.3 Determination of CEC
7.3.1 General
7.3.2 Determination of ammonia nitrogen by distillation
7.3.3 Spectrophotometric determination
7.3.4 Spectrometric determination of cobalt
7.4 Determination of cobalt and exchangeable cations
7.4.1 General
7.4.2 Standard solutions for exchangeable cations
7.4.3 Standard solutions for cobalt
7.4.4 Spectrometric determination of exchangeable cations
7.4.5 Spectrometric determination of cobalt
7.4.6 Calculation of exchangeable cations
8 Test report
9 Validation
Annex A (informative) Comparison of different methods for the determination of effective CEC
Annex B (informative) Results of the interlaboratory comparison for extraction with hexamminecobalt(III)chloride
Annex C (informative) Results of the interlaboratory comparison for extraction with calcite saturated hexamminecobalt(III)chloride solution
Annex D (informative) Carbonate and sulfate field model
Annex E (informative) Effect of minimization of Ca errors by calcite saturation of hexamminecobalt
Bibliography
Previous versions
Keep me up-to-date
Register to receive notifications when updates are made to this standard.
Related Information
Similar Standards
-
BS 7755-3.4:1995
Soil quality. Chemical methods, Determination of the specific electrical conductivity
-
BS EN ISO 11272:2017
Soil quality. Determination of dry bulk density
-
BS EN ISO 11272:2017 - TC
Tracked Changes. Soil quality. Determination of dry bulk density
-
BS EN ISO 11276:2014
Soil quality. Determination of pore water pressure. Tensiometer method
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Procedure
7.1 Test portion
7.2 Exchange reaction
7.3 Determination of CEC
7.3.1 General
7.3.2 Determination of ammonia nitrogen by distillation
7.3.3 Spectrophotometric determination
7.3.4 Spectrometric determination of cobalt
7.4 Determination of cobalt and exchangeable cations
7.4.1 General
7.4.2 Standard solutions for exchangeable cations
7.4.3 Standard solutions for cobalt
7.4.4 Spectrometric determination of exchangeable cations
7.4.5 Spectrometric determination of cobalt
7.4.6 Calculation of exchangeable cations
8 Test report
9 Validation
Annex A (informative) Comparison of different methods for the determination of effective CEC
Annex B (informative) Results of the interlaboratory comparison for extraction with hexamminecobalt(III)chloride
Annex C (informative) Results of the interlaboratory comparison for extraction with calcite saturated hexamminecobalt(III)chloride solution
Annex D (informative) Carbonate and sulfate field model
Annex E (informative) Effect of minimization of Ca errors by calcite saturation of hexamminecobalt
Bibliography