ISO/TR 20489:2018 PDF

Name: ISO/TR 20489:2018 — Nanotechnologies — Sample preparation for the characterization of metal and metal-oxide nano-objects in water samples
SKU: ISO/TR 20489:2018
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Nanotechnologies — Sample preparation for the characterization of metal and metal-oxide nano-objects in water samples

Название (английский):

ISO/TR 20489:2018

Nanotechnologies — Sample preparation for the characterization of metal and metal-oxide nano-objects in water samples

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 12 декабря 2018 г.
Издание:: ISO TR 20489 edition 1 version 1
ICS:: 07.120

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Описание (английский):

This document provides an overview of approaches of sample preparation (i.e. pre-treatment and size-fractionation) for analytical measurements applied to surface and drinking water, potentially containing relevant amounts and types of metal and metal oxide nano-objects, including collection from source and storage of samples, pre-concentration of analytes, and their fractionation.

Abstract

Похожие стандарты

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Overview

ISO/TR 20489:2018 - Nanotechnologies - Sample preparation for the characterization of metal and metal-oxide nano-objects in water samples - is a technical report that provides an overview of sample preparation approaches for analytical measurements of metal and metal-oxide nano-objects in surface water and drinking water. It covers stages from sample collection and storage through pre-concentration and size-fractionation, with the goal of supporting reliable characterization of nano-objects such as titanium dioxide (TiO2), zinc oxide (ZnO), silver (Ag) and gold (Au).

Key topics and technical content

Scope and terms: Definitions for manufactured nanomaterials, nano-objects and relevant measurands; focus on surface water and drinking water matrices.

Sample collection & storage: Practical guidance referencing ISO 5667 series for sampling design, preservation and handling. Typical container materials include HDPE and borosilicate glass; samples are usually stored at ambient or sub-ambient temperatures (not frozen) and may require stabilizers or antimicrobials.

Pre-treatment methods: Rationale for removing large particulates and/or concentrating nano-objects prior to analysis. Important caution: pre-treatment can remove nano-objects through adsorption to larger particulates.

Sedimentation and centrifugation: Use of gravitational sedimentation (simple, suitable for bulk removal of particles > ~5 µm) and centrifugation for differential separation and concentration. Notes on operational parameters (RPM vs g-force) and how settling depends on particle size and density.

Filtration and size-fractionation: Techniques described include membrane filtration, ultrafiltration (UF), size exclusion chromatography (SEC/GPC) and field-flow fractionation (FFF/Flow FFF) - with summaries of advantages and limitations for each approach.

Annex and references: Informative annex listing relevant characterization techniques and bibliography referencing ISO/TR 18196:2016 and other literature.

Practical applications and intended users

ISO/TR 20489:2018 is designed to help:

Environmental laboratories and analytical chemists preparing water samples for nanoparticle characterization.

Water utilities and drinking-water laboratories assessing potential nano-objects after treatment.

Regulatory bodies and environmental monitoring programs developing sampling protocols for nanoparticle occurrence and fate.

Researchers and industry stakeholders (nanomaterial manufacturers, product testing labs) seeking harmonized pre-analysis practices prior to techniques like DLS, TEM, ICP-MS or FFF-coupled analysis.

Related standards and guidance

ISO 5667 series (water sampling design, preservation and handling)

ISO/TR 18196:2016 (detection/characterization methods for nano-objects in water)

ISO/TS 80004 series (nanotechnology terminology)

ISO/TR 20489:2018 is a pragmatic reference to improve comparability of nanoparticle measurements in aquatic matrices and to inform development of future standardized methods for metal and metal-oxide nano-object analysis.

ISO/TR 20489:2018 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical content

Practical applications and intended users

Related standards and guidance

Технические детали

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