SIST EN ISO 1833-27:2019

Textiles - Quantitative chemical analysis - Part 27: Mixtures of cellulose fibres with certain other fibres (method using aluminium sulfate) (ISO 1833-27:2018)

This document specifies a method, using aluminium sulfate, to determine the mass percentage of cellulose fibres, after removal of non-fibrous matter, in textiles made of mixtures of
—          cellulose fibres (natural or regenerated)
with
—          polyester, polyamide, acrylic, wool and elastane fibres.

Textilien - Quantitative chemische Analyse - Teil 27: Mischungen von Cellulosefasern mit bestimmten anderen Fasern (Verfahren mit Aluminiumsulfat) (ISO 1833-27:2018)

Dieses Dokument legt ein Aluminiumsulfat Verfahren zur Bestimmung des prozentualen Massenanteils an Cellulosefasern, nach dem Abtrennen der nichtfaserigen Begleitstoffe, in Textilien aus Mischungen aus
—   Cellulosefasern (natürlich oder regeneriert)
mit
—   Polyester-, Polyamid-, Polyacryl-, Woll- und Elastanfasern fest.

Textiles - Analyse chimique quantitative - Partie 27: Mélanges de fibres cellulosiques avec certaines autres fibres (méthode au sulfate d'aluminium) (ISO 1833-27:2018)

Le présent document spécifie une méthode de détermination, au sulfate d'aluminium, de la masse, exprimée en pourcentage, de fibres de cellulose, après élimination des matières non fibreuses, dans les textiles composés de mélanges de:
—          fibres de cellulose (naturelles ou régénérées);
avec
—          polyester, polyamide, acrylique, laine et élasthanne.

Tekstilije - Kvantitativna kemijska analiza - 27. del: Mešanice celuloznih vlaken z nekaterimi drugimi vlakni (metoda z uporabo aluminijevega sulfata) (ISO 1833-27:2018)

Ta dokument določa metodo z uporabo aluminijevega sulfata za ugotavljanje masnega odstotka celuloznih vlaken po odstranitvi nevlakenske snovi v tekstilijah iz mešanic:
– celuloznih vlaken (naravnih ali regeneriranih)
in
– poliestrskih, poliamidnih, akrilnih, volnenih in elastanovih vlaken.

General Information

• Status: Published
• Public Enquiry End Date: 03-Mar-2019
• Publication Date: 10-Jul-2019
• ICS: 59.060.01 - Textile fibres in general
• ICS: 71.040.40 - Chemical analysis
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 08-Jul-2019
• Due Date: 12-Sep-2019
• Completion Date: 11-Jul-2019
• Ref Project: EN ISO 1833-27:2019 - Textiles - Quantitative chemical analysis - Part 27: Mixtures of cellulose fibres with certain other fibres (method using aluminium sulfate) (ISO 1833-27:2018)

Overview

EN ISO 1833-27:2019 (ISO 1833-27:2018) specifies a quantitative chemical analysis method using aluminium sulfate to determine the mass percentage of cellulose fibres (natural or regenerated) in textile mixtures after removal of non‑fibrous matter. The method is applicable where cellulose is blended with polyester, polyamide, acrylic, wool and elastane. It is part of the ISO 1833 series on textile composition analysis and was adopted by CEN as a European Standard.

Key topics and technical requirements

• Principle: Cellulose fibres are selectively degraded (carbonized) by an aluminium sulfate/glycerol solution plus heat; the remaining non‑cellulosic residue is collected, washed, dried and weighed. Cellulose content is calculated by difference against the original dry mass.
• Reagents: Aluminium sulfate octadecahydrate (specified assay), glycerol, and guar gum are used to prepare the carbonization solution.
• Apparatus & conditions:
  • Heated plate press operating at 160 ± 2 °C with defined pressure for carbonization.
  • Mechanical shaker, stainless steel balls, square plastic bottles and a 120–150 µm standard sieve for removing and recovering residue.
  • Wringer for ensuring complete impregnation of the specimen.
• Procedure highlights:
  • Soak specimens in the carbonization solution, ensure adequate wet mass, press and heat for a defined time, then mechanically remove carbonized cellulose and recover residue for weighing.
  • Microscopic examination of residue is recommended to confirm complete removal of carbonized cellulose.
• Safety & environment: The method offers a safer, more eco‑friendly alternative to hazardous solvents (e.g., concentrated acids, dimethylformamide) used in some selective dissolution methods.
• Traceability: Follow ISO 1833‑1 general principles for sampling, calculation and expression of results. Precision and validation data are included in the standard.

Applications and users

• Quality control laboratories in textile and apparel manufacturing for verifying fibre composition.
• Third‑party testing labs, inspection bodies and customs authorities checking fibre content claims and labeling compliance.
• R&D and product development teams assessing blends and recycling feedstock composition.
• Standards developers and conformity assessment organizations integrating composition analysis methods. Keywords: textile quantitative chemical analysis, aluminium sulfate method, cellulose fibre content, textile testing, EN ISO 1833‑27:2019.

Related standards

• ISO 1833 series (general quantitative chemical analysis principles).
• ISO 1833‑1 (general principles and procedures referenced by this part). Note: consult the full EN ISO 1833‑27:2019 text for complete technical details, safety warnings and normative references before implementation.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2019
Tekstilije - Kvantitativna kemijska analiza - 27. del: Mešanice celuloznih vlaken z
nekaterimi drugimi vlakni (metoda z uporabo aluminijevega sulfata) (ISO 1833-
27:2018)
Textiles - Quantitative chemical analysis - Part 27: Mixtures of cellulose fibres with
certain other fibres (method using aluminium sulfate) (ISO 1833-27:2018)
Textilien - Quantitative chemische Analyse - Teil 27: Mischungen von Cellulosefasern mit
bestimmten anderen Fasern (Verfahren mit Aluminiumsulfat) (ISO 1833-27:2018)
Textiles - Analyse chimique quantitative - Partie 27: Mélanges de fibres cellulosiques
avec certaines autres fibres (méthode au sulfate d'aluminium) (ISO 1833-27:2018)
Ta slovenski standard je istoveten z: EN ISO 1833-27:2019
ICS:
59.060.01 Tekstilna vlakna na splošno Textile fibres in general
71.040.40 Kemijska analiza Chemical analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 1833-27
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 59.060.01
English Version
Textiles - Quantitative chemical analysis - Part 27:
Mixtures of cellulose fibres with certain other fibres
(method using aluminium sulfate) (ISO 1833-27:2018)
Textiles - Analyse chimique quantitative - Partie 27: Textilien - Quantitative chemische Analyse - Teil 27:
Mélanges de fibres cellulosiques avec certaines autres Mischungen von Cellulosefasern mit bestimmten
fibres (méthode au sulfate d'aluminium) (ISO 1833- anderen Fasern (Verfahren mit Aluminiumsulfat) (ISO
27:2018) 1833-27:2018)
This European Standard was approved by CEN on 12 May 2019.

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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1833-27:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 1833-27:2018 has been prepared by Technical Committee ISO/TC 38 "Textiles” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 1833-27:2019
by 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 December 2019, and conflicting national standards
shall be withdrawn at the latest by December 2019.
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.
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 1833-27:2018 has been approved by CEN as EN ISO 1833-27:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 1833-27
First edition
2018-09
Textiles — Quantitative chemical
analysis —
Part 27:
Mixtures of cellulose fibres with
certain other fibres (method using
aluminium sulfate)
Textiles — Analyse chimique quantitative —
Partie 27: Mélanges de fibres cellulosiques avec certaines autres fibres
(méthode au sulfate d'aluminium)
Reference number
ISO 1833-27:2018(E)
©
ISO 2018
ISO 1833-27:2018(E)
© ISO 2018
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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Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 1833-27:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagent . 1
6 Apparatus . 2
7 Sampling and pre-treatment of sample . 2
7.1 Sampling . 2
7.2 Pre-treatment of laboratory test sample . 2
8 Preparation of carbonization solution . 2
9 Test procedure . 2
9.1 General . 2
9.2 Soaking the test specimen with carbonization solution . 2
9.3 Carbonizing . 3
9.4 Removal of carbonized fibre. 3
10 Calculation and expression of results . 3
11 Precision .
...