SIST EN ISO 1833-28:2020

Textiles - Quantitative chemical analysis - Part 28: Mixtures of chitosan with certain other fibres (method using diluted acetic acid) (ISO 1833-28:2019)

This document specifies a method, using diluted acetic acid, to determine the mass percentage of chitosan fibres, after elimination of non-fibrous matter, in textiles made of mixtures of:
—          chitosan fibre
with
—          certain other fibres.
This method is applicable to fibre mixtures of chitosan fibre with cellulose fibres (cotton, linen, ramie, viscose, modal, lyocell), protein fibres (wool, cashmere, silk), or synthetic fibres (polyester, polyamide, acrylic).

Textilien - Quantitative chemische Analysen - Teil 28: Mischungen aus Chitosan mit bestimmten anderen Fasern (Essigsäure-Verfahren) (ISO 1833-28:2019)

Dieses Dokument legt ein Verfahren fest mit verdünnter Essigsäure zur Bestimmung des prozentualen Massenanteils von Chitosanfasern nach Eliminierung nichtfaseriger Begleitstoffe in Textilien aus Mischungen aus:
- Chitosanfasern
mit
- bestimmten anderen Fasern.
Dieses Verfahren ist anzuwenden für Fasermischungen aus Chitosanfasern mit Cellulosefasern (Baumwolle, Leinen, Ramie, Viskose, Modal, Lyocell), Proteinfasern (Wolle, Kaschmir, Seide) oder synthetischen Fasern (Polyester, Polyamid, Polyacryl).

Textiles - Analyse chimique quantitative - Partie 28: Mélanges de chitosane avec certaines autres fibres (méthode à l'acide acétique dilué) (ISO 1833-28:2019)

Le présent document spécifie une méthode de détermination, à l'aide d'acide acétique dilué, de la masse exprimée en pourcentage, après élimination des matières non fibreuses, dans les textiles composés de mélanges de:
—          fibres de chitosane;
avec
—          certaines autres fibres.
Cette méthode s'applique aux mélanges de fibres composés de fibres de chitosane avec des fibres de cellulose (coton, lin, ramie, viscose, modal, lyocell), des fibres protéiniques (laine, cachemire, soie) ou des fibres synthétiques (polyester, polyamide, acrylique).

Tekstilije - Kvantitativna kemična analiza - 28. del: Mešanice hitozana z nekaterimi drugimi vlakni (metoda z uporabo razredčene ocetne kisline) (ISO 1833-28:2019)

General Information

• Status: Published
• Public Enquiry End Date: 02-Jan-2020
• Publication Date: 17-May-2020
• 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: 12-May-2020
• Due Date: 17-Jul-2020
• Completion Date: 18-May-2020
• Ref Project: EN ISO 1833-28:2020 - Textiles - Quantitative chemical analysis - Part 28: Mixtures of chitosan with certain other fibres (method using diluted acetic acid) (ISO 1833-28:2019)

Overview

SIST EN ISO 1833-28:2020 specifies a standardized method for the quantitative chemical analysis of textiles containing mixtures of chitosan fibre with other fibres. Using diluted acetic acid, this method accurately determines the mass percentage of chitosan fibres in blended textile materials. This standard supports quality control and material verification in textile manufacturing involving bio-based chitosan fibres alongside cellulose, protein, and synthetic fibres.

The standard embraces a broad range of fibre combinations, including chitosan blended with:

• Cellulose fibres: cotton, linen, ramie, viscose, modal, lyocell
• Protein fibres: wool, cashmere, silk
• Synthetic fibres: polyester, polyamide, acrylic

This method ensures precise measurement by dissolving chitosan in diluted acetic acid, filtering residues, washing, drying, and weighing the leftover fibres to calculate the chitosan content.

Key Topics

• Purpose: Quantitative determination of chitosan fibre mass percentage in textiles after removing non-fibrous matter.
• Method principle: Chitosan fibre dissolves in diluted acetic acid; remaining fibres are isolated, dried, and weighed to calculate chitosan share.
• Chemical reagents: Diluted acetic acid (20 ml acetic acid per litre water) and diluted ammonia solution (80 ml ammonia per litre water).
• Apparatus requirements: Conical flask, mechanical shaker with water bath (90–95 °C), filter crucibles, and standard laboratory utensils.
• Test procedure:
  • Specimen treatment with diluted acetic acid under controlled temperature and agitation
  • Filtration and washing with ammonia and water to remove soluble components
  • Drying and weighing residual fibre mix for calculation
• Precision: Confidence limits within ±1 percentage point at 95% confidence level, based on interlaboratory trials.
• Statistical validation: Data from multiple labs confirm repeatability and reproducibility across different fibre blends.

Applications

SIST EN ISO 1833-28:2020 is critical for:

• Textile quality control: Ensuring precise quantification of chitosan fibre in blended fabrics supports manufacturing consistency and compliance.
• Fibres and material certification: Verifying the chitosan content in textiles for labeling, performance claims, or regulatory requirements.
• Research and development: Facilitating innovation in bio-based blended textiles by providing a reliable testing framework.
• Sustainability assessments: Assisting in verifying natural fibre content contributing to environmentally friendly textiles.
• Industry compliance: Helping manufacturers comply with international standards in textile fibre analysis and reporting.

Related Standards

• ISO 1833-1: General principles of quantitative chemical analysis of textiles, foundational for understanding sample preparation and test methods.
• ISO 2076: Defines generic names for man-made fibres, relevant for classification of fibres including chitosan.
• ISO 13528: Provides statistical methods for proficiency testing and interlaboratory comparison, used for precision validation in ISO 1833-28.
• ISO 5725-5: Addresses accuracy of measurement methods, including repeatability and reproducibility concepts essential to chitosan fibre testing.

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Keywords: EN ISO 1833-28, textile chemical analysis, chitosan fibre, fibre mixture analysis, diluted acetic acid method, quantitative textile testing, cellulose fibres, protein fibres, synthetic fibres, textile quality control, textile standards, chemical composition determination, textile testing method, fibre mass percentage, CEN textile standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2020
Tekstilije - Kvantitativna kemična analiza - 28. del: Mešanice hitozana z nekaterimi
drugimi vlakni (metoda z uporabo razredčene ocetne kisline) (ISO 1833-28:2019)
Textiles - Quantitative chemical analysis - Part 28: Mixtures of chitosan with certain other
fibres (method using diluted acetic acid) (ISO 1833-28:2019)
Textilien - Quantitative chemische Analysen - Teil 28: Mischungen aus Chitosan mit
bestimmten anderen Fasern (Essigsäure-Verfahren) (ISO 1833-28:2019)
Textiles - Analyse chimique quantitative - Partie 28: Mélanges de chitosane avec
certaines autres fibres (méthode à l'acide acétique dilué) (ISO 1833-28:2019)
Ta slovenski standard je istoveten z: EN ISO 1833-28:2020
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 1833-28
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2020
EUROPÄISCHE NORM
ICS 59.060.01
English Version
Textiles - Quantitative chemical analysis - Part 28:
Mixtures of chitosan with certain other fibres (method
using diluted acetic acid) (ISO 1833-28:2019)
Textiles - Analyse chimique quantitative - Partie 28: Textilien - Quantitative chemische Analysen - Teil 28:
Mélanges de chitosane avec certaines autres fibres Mischungen aus Chitosan mit bestimmten anderen
(méthode à l'acide acétique dilué) (ISO 1833-28:2019) Fasern (Verfahren mit verdünnter Essigsäure) (ISO
1833-28:2019)
This European Standard was approved by CEN on 13 April 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 1833-28:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 1833-28:2019 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 1833-28:2020
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 October 2020, and conflicting national standards shall
be withdrawn at the latest by October 2020.
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 1833-28:2019 has been approved by CEN as EN ISO 1833-28:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 1833-28
First edition
2019-06
Textiles — Quantitative chemical
analysis —
Part 28:
Mixtures of chitosan with certain
other fibres (method using diluted
acetic acid)
Textiles — Analyse chimique quantitative —
Partie 28: Mélanges de chitosane avec certaines autres fibres
(méthode à l'acide acétique dilué)
Reference number
ISO 1833-28:2019(E)
©
ISO 2019
ISO 1833-28:2019(E)
© ISO 2019
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 2019 – All rights reserved

ISO 1833-28:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents . 2
6 Apparatus . 2
7 Test procedure . 2
8 Calculation and expression of results . 3
9 Precision . 3
Annex A (informative) Statistic data of interlaboratory trial . 4
Bibliography . 5
...