Textiles - Quantitative chemical analysis - Part 1: General principles of testing (ISO 1833-1:2020)

This document specifies a common method for the quantitative chemical analysis of various mixtures
of fibres. This method and the methods described in the other parts of ISO 1833 are applicable, in
general, to fibres in any textile form. Where certain textile forms are excepted, these are listed in the
scope of the appropriate part.

Textilien - Quantitative chemische Analysen - Teil 1: Allgemeine Grundlagen der Prüfung (ISO 1833-1:2020)

Dieses Dokument legt ein übliches Verfahren zur quantitativen chemischen Analyse verschiedenartiger Fasermischungen fest. Dieses Verfahren sowie die in den anderen Teilen von ISO 1833 beschriebenen Verfahren sind im Allgemeinen anzuwenden für Fasern in jeder beliebigen textilen Form. Sofern bestimmte textile Formen ausgeschlossen sind, werden diese im Anwendungsbereich des entsprechenden Teils aufgeführt.

Textiles - Analyse chimique quantitative - Partie 1: Principes généraux des essais (ISO 1833-1:2020)

Le présent document spécifie une méthode commune pour l'analyse chimique quantitative de divers mélanges de fibres. La présente méthode et les méthodes spécifiées dans les autres parties de l'ISO 1833 sont en général applicables aux fibres contenues dans tous types de textiles. Lorsque certains types de textiles sont exclus, ils sont énumérés dans le domaine d'application de la partie appropriée.

Tekstilije - Kvantitativna kemijska analiza - 1. del: Splošna načela preskušanja (ISO 1833-1:2020)

General Information

Status
Published
Public Enquiry End Date
01-Dec-2019
Publication Date
10-Aug-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
15-Jul-2020
Due Date
19-Sep-2020
Completion Date
11-Aug-2020

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SLOVENSKI STANDARD
SIST EN ISO 1833-1:2020
01-september-2020
Nadomešča:
SIST EN ISO 1833-1:2013

Tekstilije - Kvantitativna kemijska analiza - 1. del: Splošna načela preskušanja (ISO

1833-1:2020)

Textiles - Quantitative chemical analysis - Part 1: General principles of testing (ISO 1833-

1:2020)

Textilien - Quantitative chemische Analysen - Teil 1: Allgemeine Grundlagen der Prüfung

(ISO 1833-1:2020)

Textiles - Analyse chimique quantitative - Partie 1: Principes généraux des essais (ISO

1833-1:2020)
Ta slovenski standard je istoveten z: EN ISO 1833-1:2020
ICS:
59.060.01 Tekstilna vlakna na splošno Textile fibres in general
71.040.40 Kemijska analiza Chemical analysis
SIST EN ISO 1833-1:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 1833-1:2020
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SIST EN ISO 1833-1:2020
EN ISO 1833-1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2020
EUROPÄISCHE NORM
ICS 59.060.01 Supersedes EN ISO 1833-1:2010
English Version
Textiles - Quantitative chemical analysis - Part 1: General
principles of testing (ISO 1833-1:2020)

Textiles - Analyse chimique quantitative - Partie 1: Textilien - Quantitative chemische Analysen - Teil 1:

Principes généraux des essais (ISO 1833-1:2020) Allgemeine Grundlagen der Prüfung (ISO 1833-1:2020)

This European Standard was approved by CEN on 12 June 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1833-1:2020 E

worldwide for CEN national Members.
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SIST EN ISO 1833-1:2020
EN ISO 1833-1:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 1833-1:2020
EN ISO 1833-1:2020 (E)
European foreword

This document (EN ISO 1833-1:2020) has been prepared by Technical Committee ISO/TC 38 "Textiles"

in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of

which is held by BSI.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by January 2021, and conflicting national standards shall

be withdrawn at the latest by January 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 1833-1:2010.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 1833-1:2020 has been approved by CEN as EN ISO 1833-1:2020 without any

modification.
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SIST EN ISO 1833-1:2020
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SIST EN ISO 1833-1:2020
INTERNATIONAL ISO
STANDARD 1833-1
Second edition
2020-06
Textiles — Quantitative chemical
analysis —
Part 1:
General principles of testing
Textiles — Analyse chimique quantitative —
Partie 1: Principes généraux des essais
Reference number
ISO 1833-1:2020(E)
ISO 2020
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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Reagents ........................................................................................................................................................................................................................ 2

6 Apparatus ..................................................................................................................................................................................................................... 2

7 Conditioning and testing atmosphere ............................................................................................................................................ 2

8 Sampling and pre-treatment of laboratory test sample .............................................................................................. 2

8.1 Sampling ....................................................................................................................................................................................................... 2

8.2 Pre-treatment of laboratory test sample .......................................................................................................................... 2

9 Procedure..................................................................................................................................................................................................................... 3

9.1 General instructions ........................................................................................................................................................................... 3

9.1.1 Handling .................................................................................................................................................................................. 3

9.1.2 Drying ........................................................................................................................................................................................ 3

9.1.3 Drying of test specimens ........................................................................................................................................... 3

9.1.4 Drying of crucible and residue ............................................................................................................................. 3

9.1.5 Cooling ...................................................................................................................................................................................... 3

9.1.6 Weighing ................................................................................................................................................................................. 3

9.2 Testing execution .................................................................................................................................................................................. 3

10 Calculation and expression of results ............................................................................................................................................. 4

11 Precision of the methods ............................................................................................................................................................................. 5

12 Test report ................................................................................................................................................................................................................... 5

Annex A (normative) Methods for the removal of non-fibrous matter............................................................................. 7

Annex B (normative) Method of quantitative analysis by manual separation ......................................................15

Bibliography .............................................................................................................................................................................................................................18

© ISO 2020 – All rights reserved iii
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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 38, Textiles, in collaboration with the

European Committee for Standardization (CEN) Technical Committee CEN/TC 248, Textile and textile

products, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna

Agreement).

This second edition cancels and replaces the first edition (ISO 1833-1:2006), which has been technically

revised. It also incorporates the Technical Corrigendum ISO 1833-1:2006/Cor 1:2009.

The main changes compared to the previous edition are as follows:

— Introduction, A.2 and bibliography: a reference to ISO/TR 11827 regarding the fibre identification

has been added;
— Clause 2: normative references have been added;

— Clause 4: references to ISO 2076 and ISO 6938 have been added for the use of the generic names in

the ISO 1833 series;

— Clause 5: warning sentences and reference to grade 3 water have been introduced;

— Clause 6: stoppered weighing bottles have been added;

— 8.2: all pretreatments have been described in Annex A (including pretreatment with light petroleum)

a requirement for reporting if any pretreatment is carried out [see Clause 12, e)] has been introduced;

— 9.1.1: instructions for handling have been added;
— 9.1.2: instructions for short drying period have been added;
— 9.1.6 (former 9.1.5): a note has been removed;
— 9.2: a requirement regarding the number of test specimens has been added;
iv © ISO 2020 – All rights reserved
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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)

— Clause 10: deletion of former 10.3 (consideration of only percentage additions for moisture, case

included in the new 10.3 covering percentage additions for moisture and non-fibrous matter, and/

or percentage losses of fibrous matter by pre-treatment);

— 10.3: additional instructions in case of calculated percentage greater than 100 % have been given;

— Annexes A and B have been changed to normative;

— Table A.1 and concerned subclauses: additional cases regarding elastane (see A.5.1.2), elastolefin

(see A.5.1.3), bast fibres (see A.5.25) have been introduced;

— B.8.1 and B.8.2: a requirement regarding the number of test specimens has been added.

A list of all parts in the ISO 1833 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO 2020 – All rights reserved v
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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)
Introduction

Methods for the quantitative analysis of fibre mixtures are based on two main processes, the manual

separation and the chemical separation of fibres.

It is preferable to use the method of manual separation, which is given in Annex B, whenever possible

since it generally gives more accurate results than the chemical method. It can be used for all textiles

whose component fibres do not form an intimate mixture, for example in the case of yarns composed of

several elements each of which is made up of only one type of fibre, or woven fabrics in which the fibre

of the warp is of a different kind to that of the weft, or knitted fabrics capable of being unravelled made

up of yarns of different types.

In general, the methods described in the different parts of ISO 1833 are based on the selective

dissolution of an individual component. After the removal of a component, the insoluble residue is

weighed, and the proportion of soluble component is calculated from the loss in mass. This document

gives the information which is common to the analyses, by this method, of all fibre mixtures, whatever

their composition. This information is intended to be used in conjunction with the other parts of

ISO 1833; these parts contain the detailed procedures applicable to particular fibre mixtures. Where,

occasionally, an analysis is based on a principle other than selective dissolution, full details are given in

the appropriate part.

Mixtures of fibres obtained during processing and, to a lesser extent, in finished textiles can contain

non-fibrous matter, such as fats, waxes or dressings, or water-soluble matter, either occurring naturally

or added to facilitate processing. Non-fibrous matters are removed before analysis.

A method of pre-treatment for removing oils, fats, waxes and water-soluble matter is given in Annex A.

Dye in dyed fibres is considered to be an integral part of the fibre and is not removed.

In addition, textiles can contain resins or other matter added to bond the fibres together or to confer

special properties, such as water-repellence or crease-resistance. Such matter, including dyestuffs in

exceptional cases, can interfere with the action of the reagent on the soluble component and/or it can

be partially or completely removed by the reagent. This type of added matter can also cause errors and

are removed before the sample is analysed. If it is impossible to remove such added matter, the methods

of analysis are no longer applicable.

Most textile fibres contain water, the amount depending on the type of fibre and on the relative

humidity of the surrounding air. Analyses are conducted on the basis of dry mass, and a procedure for

determining the dry mass of test specimens and residues is given in this document.

The result is therefore obtained on the basis of clean, dry fibres.
Provision is made for recalculating the result on the basis of
a) agreed moisture regain

NOTE The agreed moisture regain of each fibre is specified in some regional legislation or after

agreement between interested parties.
b) agreed moisture regain and also for
1) fibrous matter removed in the pre-treatment, and

2) non-fibrous matter (for example, fibre dressing, processing oil, or size) that can be properly

regarded as part of the fibre as an article of commerce.

In some methods, the insoluble component of a mixture can be partially dissolved in the reagent used

to dissolve the soluble component. Where possible, the reagents that have been chosen are those that

have little or no effect on the insoluble fibres. If loss in mass is known to occur during the analysis, the

result is corrected; correction factors for this purpose are given. These correction factors have been

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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)

determined in several laboratories by treating, in the appropriate reagent as specified in the method of

analysis, fibres cleaned by the pre-treatment.

These correction factors apply only to undegraded fibres, and different correction factors might be

necessary if the fibres have been degraded during processing.

The procedures given apply to single determinations; at least two determinations on separate test

specimens are made, both in the case of manual separation and in the case of chemical separation, but

more may be carried out if desired.

Before proceeding with any quantitative analysis, it is assumed that all the fibres present in the mixture

have been identified. For this purpose, ISO/TR 11827 may be used.

For confirmation, unless it is technically impossible, it is recommended that use be made of alternative

procedures whereby the component that would be the residue in the standard method is dissolved

out first.
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SIST EN ISO 1833-1:2020
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SIST EN ISO 1833-1:2020
INTERNATIONAL STANDARD ISO 1833-1:2020(E)
Textiles — Quantitative chemical analysis —
Part 1:
General principles of testing
1 Scope

This document specifies a common method for the quantitative chemical analysis of various mixtures

of fibres. This method and the methods described in the other parts of ISO 1833 are applicable, in

general, to fibres in any textile form. Where certain textile forms are excepted, these are listed in the

scope of the appropriate part.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 105-C10, Textiles — Tests for colour fastness — Part C10: Colour fastness to washing with soap or soap

and soda
ISO 2076, Textiles — Man-made fibres — Generic names
ISO 3696, Water for analytical laboratory use — Specification and test methods

ISO 5089, Textiles — Preparation of laboratory test samples and test specimens for chemical testing

ISO 6938, Textiles — Natural fibres — Generic names and definitions
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5089 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
non-fibrous matter

processing aids such as lubricants and sizes or naturally occurring non-fibrous substances

4 Principle

After the identification of the components of a mixture, the non-fibrous matter is removed by suitable

pre-treatment and then one of the components is determined usually by selective dissolution or manual

separation (see Annex B). The insoluble residue is dried and weighed, and the proportion of soluble

component calculated from the loss in mass. It is usually preferable to dissolve the fibre present in the

greater proportion, thus obtaining the fibre present in the smaller proportion as residue.

The fibre names in the ISO 1833 series are in accordance with the generic names listed in ISO 6938 for

the natural fibres and ISO 2076 for the man-made fibres.
© ISO 2020 – All rights reserved 1
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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)
5 Reagents
Use only reagents of analytical grade. Reagents are listed in Table A.1.

WARNING — The ISO 1833 series may call for the use of substances/procedures that may be

injurious to the health/environment if appropriate conditions are not observed. It refers only to

technical suitability and does not absolve the user from legal obligations relating to health and

safety/environment at any stage.
5.1 Water, grade 3 (according to ISO 3696).
6 Apparatus

6.1 Glass filter crucible, capacity 30 ml to 40 ml, with sealed-in sintered disk filter with pore size of

90 µm to 150 µm.

In place of a glass filter crucible, any other apparatus giving identical results may be used.

6.2 Stoppered weighing bottles, large enough to contain such crucibles.
6.3 Vacuum flask.
6.4 Desiccator, containing self-indicating silica gel.
6.5 Ventilated oven, for drying test specimens at (105 ± 3) °C.
6.6 Analytical balance, with a resolution of 0,000 2 g or better.

6.7 Soxhlet extraction apparatus, or any other apparatus giving identical results.

NOTE Soxhlet size of a volume, in millilitres, equal to 20 times the mass, in grams, of the laboratory test

sample has been found convenient.
7 Conditioning and testing atmosphere

Because dry masses are determined, it is unnecessary to condition the test specimen. The analysis is

carried out under ordinary room conditions.
8 Sampling and pre-treatment of laboratory test sample
8.1 Sampling

Take a laboratory test sample, as described in ISO 5089, that is representative of the laboratory bulk

sample and sufficient to provide all the test specimens, each of at least 1 g, that are required. Fabrics

may contain yarns of different composition and account should be taken of this fact in the sampling of

the fabric. Treat the laboratory test sample as described in 8.2.
8.2 Pre-treatment of laboratory test sample

Laboratory test sample shall be pretreated by a suitable method (as described in Annex A) which does

not affect any of the fibre components.

NOTE 1 The purpose of the pretreatment is to remove non-fibrous matter, which is not to be taken into account

in the percentage calculations.
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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)

If the pretreatment is not applied, it shall be reported with the reasons of this deviation of the given

procedure.

NOTE 2 The non-application of certain pretreatments is known to have a negligible effect on the results.

9 Procedure
9.1 General instructions
9.1.1 Handling

Avoid handling crucibles and weighing bottles, test specimens or residues with bare hands during the

drying, cooling and weighing operations.
9.1.2 Drying

Conduct all drying operations for not less than 4 h and not more than 16 h at (105 ± 3) °C in a ventilated

oven with the oven door closed throughout.

If the drying period is less than 14 h, the test specimen or the residue shall be weighed to check that its

mass has become constant.

The mass may be considered to have become constant if, after a further drying period of 60 min, its

variation is less than 0,05 %.
9.1.3 Drying of test specimens

Dry the test specimen in a weighing bottle with its stopper beside it. After drying, close the weighing

bottle with its stopper before removing it from the oven, and transfer it quickly to a desiccator.

9.1.4 Drying of crucible and residue

Dry the filter crucible with the residue in a weighing bottle with its stopper beside it in the oven. After

drying, close the weighing bottle with its stopper before removing it from the oven and transfer it

quickly to the desiccator.

Where apparatus other than a filter crucible is used, drying operations in the oven shall be conducted

in such a way as to enable the dry mass of the fibres to be determined without loss.

9.1.5 Cooling

Conduct all cooling operations in the desiccator, the latter placed beside the balance, until complete

cooling of the weighing bottles is attained, and in any case for not less than 2 h.

9.1.6 Weighing

After cooling, complete the weighing of the test specimen in a weighing bottle or crucible with the

residue in a weighing bottle within 2 min of its removal from the desiccator.
Weigh to the nearest 0,000 2 g.
9.2 Testing execution

From the pre-treated laboratory test sample, take a test specimen weighing about 1 g. Cut the yarn or

dissected fabric into lengths of about 10 mm. Dry the test specimen in a weighing bottle, cool it in the

desiccator and weigh it (see 9.1).
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SIST EN ISO 1833-1:2020
ISO 1833-1:2020(E)

Transfer the test specimen to the glass vessel specified in the appropriate part of ISO 1833, reweigh

the weighing bottle with its stopper immediately, and obtain the dry mass of the test specimen by the

difference.

Complete the test procedure as specified in the appropriate part of ISO 1833 and examine the residue

microscopically (or otherwise, as appropriate) to check that the treatment has in fact completely

removed the soluble fibre.
The analysis of at least two test specimens shall be made.
10 Calculation and expression of results
10.1 General

Express the mass of the insoluble component as a percentage of the total mass of fibre in the mixture.

The percentage of soluble component is obtained by difference.

Calculate the results on the basis of clean dry mass using Formula (1), adjusted by the agreed moisture

regain and the correction factors necessary to take account of loss of matter during pre-treatment and

analysis by using Formula (2).

NOTE The agreed moisture regain of each fibre is specified in some regional legislation or after agreement

between interested parties.

10.2 Calculation of mass percentage of insoluble component on clean dry mass basis.

100××md
P= (1)
where
P is the mass percentage of clean dry insoluble component;
m is the dry mass of the test specimen, expressed in g;
m is the dry mass of the residue, expressed in g;

d is the correction factor of variation in mass of insoluble component in the reagent.

Suitabl
...

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