ISO 12782-4:2012 PDF

Name: ISO 12782-4:2012 — Soil quality — Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials — Part 4: Extraction of humic substances from solid samples
SKU: ISO 12782-4:2012
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Soil quality — Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials — Part 4: Extraction of humic substances from solid samples

Название (английский):

ISO 12782-4:2012

Soil quality — Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials — Part 4: Extraction of humic substances from solid samples

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 23
Дата публикации:: 1 июня 2012 г.
Издание:: ISO IS 12782 edition 1 version 1
ICS:: 13.080.05

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Описание (английский):

ISO 12782-4:2012 specifies a procedure to determine the concentration of humic substances in soil or other materials. Other materials also include waste. The content of humic substances can be used as input in geochemical models.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 12782-4:2012 - Soil quality: Parameters for geochemical modelling - Part 4 describes a standardized laboratory procedure for the extraction of humic substances from solid samples (soils, soil amendments and wastes). The standard specifies how to quantify humic acid (HA), fulvic acid (FA), hydrophilic organic carbon (Hy) and hydrophobic neutral organic carbon (HON) fractions. These concentrations are intended as input parameters for geochemical modelling of leaching and speciation, supporting risk assessment of contaminant mobility and bioavailability.

Key topics and technical requirements

Scope and purpose: Defines the extraction method to determine humic substance content in solid materials used in geochemical models.

Sample pretreatment: Requirements for sample size, particle-size reduction, determination of dry residue and preparation of test portions.

Extraction principle: Fractionation of humic substances using an isolation/purification procedure (including DAX-8 resin preparation) based on established IHSS methods.

Analytical workflow:

Preparation of reagents and apparatus
Extraction and fractionation to separate HA, FA, Hy and HON
Eluate treatment, storage and blank testing
Analytical determination and calculation of concentrations

Quality and reporting: Expression of results, calculation corrections, test report content and performance characteristics.

Referenced norms: Cross-references to ISO standards for laboratory water, sampling, TOC/DOC determination and sample pretreatment (e.g., ISO 3696, ISO 8245, ISO 11464).

Supporting material: Informative annexes cover procedure schematics, validation and centrifugation conditions.

Practical applications

Providing reactive organic surface input data for geochemical speciation models used to predict metal complexation, mobility and bioavailability.

Supporting environmental risk assessment and regulatory evaluations for contaminated soils, waste materials, slag, ashes and recycled aggregates.

Integrating with leaching tests (pH-dependent, percolation) to translate laboratory results to field scenarios.

Supplying standardized humic/fulvic concentration data for modelling software and thermodynamic adsorption parameterization.

Who should use ISO 12782-4

Environmental and soil laboratories performing characterization for geochemical modelling.

Soil scientists, geochemists and environmental consultants working on contaminant transport and bioavailability.

Waste managers, remediation project teams and regulators requiring standardized humic substance data for risk assessment.

Related standards

ISO 12782 series (Parts 1–5) - extraction of reactive mineral and organic surfaces (iron/aluminium oxides; humic substances in solids and aqueous samples).

ISO standards on sampling and TOC/DOC determination referenced in the document.

Keywords: ISO 12782-4, humic substances extraction, soil quality, geochemical modelling, humic acid, fulvic acid, DOC, environmental risk assessment.

ISO 12782-4:2012 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who should use ISO 12782-4

Related standards

Технические детали

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)

SIST ISO 8245:2000

Water quality - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (…

SIST ISO 11464:2006

Soil quality -- Pretreatment of samples for physico-chemical analysis

SIST EN ISO 12782-4:2013

Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and m…

BS EN ISO 12782-5:2012

Soil quality. Parameters for geochemical modelling of leaching and speciation of constituents in soils and ma…