ISO/DIS 22262-2

Air quality — Bulk materials — Part 2: Quantitative determination of asbestos by gravimetric and microscopical methods

ISO 22262-2:2014 specifies procedures for quantification of asbestos mass fractions below approximately 5 %, and quantitative determination of asbestos in vermiculite, other industrial minerals and commercial products that incorporate these minerals. ISO 22262-2:2014 is applicable to the quantitative analysis of: a) any material for which the estimate of asbestos mass fraction obtained using ISO 22262-1 is deemed to be of insufficient precision to reliably classify the regulatory status of the material, or for which it is considered necessary to obtain further evidence to demonstrate the absence of asbestos; b) resilient floor tiles, asphaltic materials, roofing felts and any other materials in which asbestos is embedded in an organic matrix; c) wall and ceiling plasters, with or without aggregate; d) mineral products such as wollastonite, dolomite, calcite, talc or vermiculite, and commercial products containing these minerals. It is not the intent of ISO 22262 to provide instruction in the fundamental microscopical and analytical techniques.

Qualité de l'air — Matériaux solides — Partie 2: Dosage quantitatif de l'amiante en utilisant les méthodes gravimétrique et microscopique

L'ISO 22262-2:2014 spécifie les modes opératoires de quantification des fractions massiques d'amiante inférieures à environ 5 % et les modes opératoires de quantification de l'amiante dans la vermiculite, dans d'autres minéraux industriels et dans les produits commerciaux contenant ces minéraux. L'ISO 22262-2:2014 est applicable à l'analyse quantitative des matériaux suivants: a) tout matériau pour lequel l'estimation de la fraction massique d'amiante obtenue à l'aide de l'ISO 22262-1 est considérée comme étant insuffisamment précise pour déterminer avec fiabilité le statut réglementaire du matériau, ou pour lequel il est nécessaire d'obtenir d'autres preuves pour démontrer l'absence d'amiante; b) les dalles souples, les matériaux bitumineux, les feutres pour toitures et tout autre matériau dans lequel de l'amiante est incorporé dans une matrice organique; c) les enduits de mur et de plafond, avec ou sans granulat; d) les produits minéraux tels que la wollastonite, la dolomite, la calcite, le talc ou la vermiculite, et les produits commerciaux contenant ces minéraux. L'objectif de l'ISO 22262 n'est pas de fournir des instructions sur les techniques de microscopie et d'analyse fondamentales.

Kakovost zraka - Razsuti materiali - 2. del: Kvantitativno določanje azbesta z gravimetrijsko in mikroskopsko metodo

General Information

• Status: Not Published
• ICS: 13.040.20 - Ambient atmospheres
• Technical Committee: ISO/TC 146/SC 3 - Ambient atmospheres
• Drafting Committee: ISO/TC 146/SC 3 - Ambient atmospheres
• Current Stage: 4060 - Close of voting
• Start Date: 31-Dec-2024
• Due Date: 01-Jan-2025
• Completion Date: 01-Jan-2025
• Ref Project: oSIST ISO/DIS 22262-2:2025 - Air quality - Bulk materials - Part 2: Quantitative determination of asbestos by gravimetric and microscopical methods

Relations

• Revises: ISO 22262-2:2014 - Air quality — Bulk materials — Part 2: Quantitative determination of asbestos by gravimetric and microscopical methods
• Effective Date: 28-Oct-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2025
Kakovost zraka - Razsuti materiali - 2. del: Kvantitativno določanje azbesta z
gravimetrijsko in mikroskopsko metodo
Air quality - Bulk materials - Part 2: Quantitative determination of asbestos by gravimetric
and microscopical methods
Qualité de l'air - Matériaux solides - Partie 2: Dosage quantitatif de l'amiante en utilisant
les méthodes gravimétrique et microscopique
Ta slovenski standard je istoveten z: ISO/DIS 22262-2
ICS:
13.040.20 Kakovost okoljskega zraka Ambient atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 22262-2
ISO/TC 146/SC 3
Air quality — Bulk materials —
Secretariat: ANSI
Part 2:
Voting begins on:
Quantitative determination of 2024-10-08
asbestos by gravimetric and
Voting terminates on:
2024-12-31
microscopical methods
Qualité de l'air — Matériaux solides —
Partie 2: Dosage quantitatif de l'amiante en utilisant les
méthodes gravimétrique et microscopique
ICS: 13.040.20
THIS DOCUMENT IS A DRAFT CIRCULATED
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Reference number
DRAFT
International
Standard
ISO/DIS 22262-2
ISO/TC 146/SC 3
Air quality — Bulk materials —
Secretariat: ANSI
Part 2:
Voting begins on:
Quantitative determination of
asbestos by gravimetric and
Voting terminates on:
microscopical methods
Qualité de l'air — Matériaux solides —
Partie 2: Dosage quantitatif de l'amiante en utilisant les
méthodes gravimétrique et microscopique
ICS: 13.040.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Published in Switzerland Reference number
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 6
5 Determination of analytical requirements . 6
6 Range . 7
7 Limit of quantification . 7
8 Principle . 7
9 Safety precautions. 8
10 Apparatus . 8
11 Reagents . 10
12 Sample size and homogeneity . 10
12.1 Sample size .10
12.2 Representative sample .10
13 Methods for gravimetric matrix reduction .11
13.1 General .11
13.2 Data recording .11
13.3 Selection and pre-treatment of a representative sub-sample . 13
13.3.1 General . 13
13.3.2 Plasters without aggregate . 13
13.3.3 Plasters with aggregate . 13
13.3.4 Cements with and without aggregate . 13
13.3.5 Floor tiles . 13
13.3.6 Asphaltic materials without aggregate .14
13.3.7 Asphaltic materials with aggregate .14
13.3.8 Caulkings, mastics, putties, groutings, wall joint compounds .14
13.3.9 Cellulosic materials .14
13.3.10 Textured coatings .14
13.4 Removal of organic materials by ashing .14
13.4.1 General .14
13.4.2 Procedure . 15
13.5 Acid treatment and sedimentation procedures . 15
13.5.1 General . 15
13.5.2 Procedure for acid treatment of samples containing soluble constituents, with
or without insoluble aggregate . 15
13.5.3 Procedure for resilient floor tile .17
13.5.4 Examination of materials for amphibole fibres .17
14 Procedures for quantification of the mass fraction of asbestos in the final residue from
gravimetric matrix reduction . .18
14.1 General .18
14.2 Examination of the residue on the filter and selection of the appropriate procedure .19
14.2.1 Gravimetric measurements alone .19
14.2.2 Visual estimation by PLM, SEM or TEM observation .19
14.2.3 Point counting by PLM or SEM . 20
14.2.4 Determination of asbestos mass fraction from fibre measurements made by
SEM or TEM .24

iii
15 Determination of asbestos in talc and other mineral powders .26
15.1 General . 26
15.2 Separation of chrysotile and amphibole by heavy liquid centrifugation .27
15.3 Determination of chrysotile and amphibole in talc and other mineral powders by TEM .27
15.3.1 General .27
15.3.2 Specimen preparation .27
15.3.3 Determination of chrysotile and amphibole mass fraction .27
15.3.4 Determination of chrysotile and amphibole numerical fibre concentrations .27
15.4 Determination of the mass fraction of chrysotile and amphibole in talc and other
mineral powders by SEM .
...