ISO 13536:1995 PDF

Soil quality — Determination of the potential cation exchange capacity and exchangeable cations using barium chloride solution buffered at pH = 8,1

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Title (English):

ISO 13536:1995

Soil quality — Determination of the potential cation exchange capacity and exchangeable cations using barium chloride solution buffered at pH = 8,1

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 7
Publication date:: June 1, 1995
Edition:: ISO IS 13536 edition 1 version 1
ICS:: 13.080.10

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Description (English):

Specifies a method for the determination of the potential cation exchange capacity (CEC) of soil buffered at pH = 8,1 and of the determination of the content of exchangeable sodium, potassium, calcium and magnesium in soil. Applicable to all types of air-dried soil samples.

Technical details

Technical committee: ISO/TC 190/SC 3 - Chemical and physical characterization
SKU: ISO 13536:1995

Abstract

Overview

ISO 13536:1995 specifies an established laboratory method for determining the potential cation exchange capacity (CEC) of soils buffered at pH = 8.1 and for measuring exchangeable cations (sodium, potassium, calcium, magnesium). The method uses a barium chloride (BaCl2) solution buffered with triethanolamine to saturate exchange sites, followed by displacement with a known excess of magnesium sulfate (MgSO4). Determinations are applicable to all types of air-dried soil samples and include procedures for sample leaching, extraction, calibration and instrumental measurement.

Keywords: ISO 13536:1995, soil quality, cation exchange capacity (CEC), barium chloride, triethanolamine, exchangeable cations, FAAS, ICP-AES, soil testing.

Key topics and technical requirements

Principle: Saturate exchange sites with Ba2+ (BaCl2 buffered to pH 8.1), precipitate barium as BaSO4 by adding excess MgSO4; sites become occupied by Mg2+. Measure excess Mg to calculate potential CEC.
Exchangeable cations: Sodium and potassium measured in the BaCl2–triethanolamine extract by flame emission spectrometry; calcium and magnesium (and optionally other metals) measured by FAAS or ICP-AES.
Reagents and concentrations explicitly referenced: BaCl2 (1 mol/L), MgSO4 (0.0200 mol/L), triethanolamine buffer at pH 8.1. Water quality per ISO 3696.
Sample handling: Applicable to air-dried,

Related standards

Mentioned in the description and other ISO standards

Overview

Keywords: ISO 13536:1995, soil quality, cation exchange capacity (CEC), barium chloride, triethanolamine, exchangeable cations, FAAS, ICP-AES, soil testing.

Key topics and technical requirements

Principle: Saturate exchange sites with Ba2+ (BaCl2 buffered to pH 8.1), precipitate barium as BaSO4 by adding excess MgSO4; sites become occupied by Mg2+. Measure excess Mg to calculate potential CEC.
Exchangeable cations: Sodium and potassium measured in the BaCl2–triethanolamine extract by flame emission spectrometry; calcium and magnesium (and optionally other metals) measured by FAAS or ICP-AES.
Reagents and concentrations explicitly referenced: BaCl2 (1 mol/L), MgSO4 (0.0200 mol/L), triethanolamine buffer at pH 8.1. Water quality per ISO 3696.
Sample handling: Applicable to air-dried,

ISO 13536:1995 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

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