EN ISO 1833-15:2019
(Main)Textiles - Quantitative chemical analysis - Part 15: Mixtures of jute with certain animal fibres (method by determining nitrogen content) (ISO 1833-15:2019)
General Information
- Abstract
This document specifies a method, by determining the nitrogen content, to calculate the proportion of each component, after the removal of non-fibrous matter, in textiles made of mixtures of
— jute
with
— animal fibres.
The animal-fibre component can consist solely of hair or wool, or of any mixtures of the two.
This document is not applicable to products in which dyestuffs or finishes contain nitrogen.
NOTE Because this method differs in principle from the general method based on selective solubility set out in ISO 1833-1, it is given in a form that is complete in itself.
- Status
- Published
- Publication Date
- 26-Nov-2019
- Withdrawal Date
- 30-May-2020
- Technical Committee
- CEN/TC 248 - Textiles and textile products
- Drafting Committee
- CEN/TC 248/WG 30 - Quantitative analysis of fibre mixtures
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 27-Nov-2019
- Completion Date
- 27-Nov-2019
Overview
EN ISO 1833-15:2019 - Textiles: Quantitative chemical analysis, Part 15 - specifies a chemical method for determining the composition of textiles made from mixtures of jute and certain animal fibres (hair and/or wool). The method is based on measuring the sample’s nitrogen content (Kjeldahl principle) after removal of non‑fibrous matter, and calculating the proportion of each component from known nitrogen contents. This part of the ISO 1833 series is a standalone procedure and is not applicable to products or finishes that contain nitrogen‑based dyestuffs or treatments.
Key topics and requirements
- Scope: Determination of the proportion of jute and animal fibres in blended textiles (jute + hair and/or wool).
- Analytical principle: Nitrogen determination (Kjeldahl digestion, distillation and titration) and conversion of nitrogen percentage to fibre proportions.
- Pre‑treatment: Removal of non‑fibrous matter via solvent extraction (Soxhlet with toluene/methanol) and repeated water extraction, followed by drying - to ensure accurate nitrogen measurement.
- Apparatus & reagents: Kjeldahl digestion and distillation apparatus, Soxhlet extractor, sulfuric acid, potassium sulfate, selenium catalyst, sodium hydroxide, boric acid and standard titrant (sulfuric acid). Reagent and apparatus requirements follow good laboratory and ISO 1833‑1 practice.
- Test procedure: Sampling per ISO 5089, specimen weighing, Kjeldahl digestion, distillation into boric acid, titration and blank correction. Results are calculated as percentage nitrogen and converted to component proportions using the known nitrogen contents of jute and the animal‑fibre component.
- Limitations & safety: Not suitable when dye or finishing agents contain nitrogen. Toxic solvents (toluene, methanol) and corrosive reagents require appropriate safety controls. Precision and calculation details are provided in the standard.
Applications and users
- Who uses it: Textile testing laboratories, manufacturers of jute‑blend fabrics, quality control and R&D teams, import/export compliance bodies, and standards organizations.
- Practical uses:
- Verifying declared fibre composition for quality control and labeling compliance.
- Resolving disputes over product composition in commercial transactions.
- Supporting product development where precise fibre ratio (jute vs. animal fibres) affects performance, dyeing or mechanical properties.
- Regulatory and certification testing for natural fibre textiles.
Related standards
- ISO 1833‑1 - General principles of quantitative chemical analysis for textiles (note: this part differs in principle from ISO 1833‑1’s selective‑solubility methods).
- ISO 5089 - Preparation of laboratory test samples and test specimens for chemical testing.
Keywords: EN ISO 1833-15:2019, jute, nitrogen content, Kjeldahl, quantitative chemical analysis, textiles, Soxhlet extraction, wool, hair, ISO 1833 series.
Relations
- Effective Date
- 04-Dec-2019
- Refers
ISO 1833-1:2006 - Textiles — Quantitative chemical analysis — Part 1: General principles of testing - Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 12-Feb-2026
Get Certified
Connect with accredited certification bodies for this standard
Control Union Certifications
Global certification for agriculture and sustainability.
Bureau Veritas Bangladesh
Bureau Veritas certification services in Bangladesh.
ECOCERT France
Leader in organic and sustainability certification worldwide.
Sponsored listings
Frequently Asked Questions
EN ISO 1833-15:2019 is a standard published by the European Committee for Standardization (CEN). Its full title is "Textiles - Quantitative chemical analysis - Part 15: Mixtures of jute with certain animal fibres (method by determining nitrogen content) (ISO 1833-15:2019)". This standard covers: This document specifies a method, by determining the nitrogen content, to calculate the proportion of each component, after the removal of non-fibrous matter, in textiles made of mixtures of — jute with — animal fibres. The animal-fibre component can consist solely of hair or wool, or of any mixtures of the two. This document is not applicable to products in which dyestuffs or finishes contain nitrogen. NOTE Because this method differs in principle from the general method based on selective solubility set out in ISO 1833-1, it is given in a form that is complete in itself.
This document specifies a method, by determining the nitrogen content, to calculate the proportion of each component, after the removal of non-fibrous matter, in textiles made of mixtures of — jute with — animal fibres. The animal-fibre component can consist solely of hair or wool, or of any mixtures of the two. This document is not applicable to products in which dyestuffs or finishes contain nitrogen. NOTE Because this method differs in principle from the general method based on selective solubility set out in ISO 1833-1, it is given in a form that is complete in itself.
EN ISO 1833-15:2019 is classified under the following ICS (International Classification for Standards) categories: 59.060.01 - Textile fibres in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 1833-15:2019 has the following relationships with other standards: It is inter standard links to EN ISO 1833-15:2010, ISO 1833-1:2006, ISO 5089:1977, ENV ISO 13843:2001, ISO 1833-15:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 1833-15:2019 is associated with the following European legislation: EU Directives/Regulations: 1007/2011; Standardization Mandates: M/532. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN ISO 1833-15:2019 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2020
Nadomešča:
SIST EN ISO 1833-15:2013
Tekstilije - Kvantitativna kemična analiza - 15. del: Mešanica jutinih in nekaterih
živalskih vlaken (metoda za ugotavljanje deleža dušika) (ISO 1833-15:2019)
Textiles - Quantitative chemical analysis - Part 15: Mixtures of jute with certain animal
fibres (method by determining nitrogen content) (ISO 1833-15:2019)
Textilien - Quantitative chemische Analysen - Teil 15: Mischungen aus Jutefasern mit
bestimmten tierischen Fasern (Bestimmung mittels Stickstoffgehalt) (ISO 1833-15:2019)
Textiles - Analyse chimique quantitative - Partie 15: Mélanges de jute avec certaines
fibres animales (méthode par détermination de la teneur en azote) (ISO 1833-15:2019)
Ta slovenski standard je istoveten z: EN ISO 1833-15:2019
ICS:
59.060.10 Naravna vlakna Natural fibres
71.040.40 Kemijska analiza Chemical analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 1833-15
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2019
EUROPÄISCHE NORM
ICS 59.060.01 Supersedes EN ISO 1833-15:2010
English Version
Textiles - Quantitative chemical analysis - Part 15:
Mixtures of jute with certain animal fibres (method by
determining nitrogen content) (ISO 1833-15:2019)
Textiles - Analyse chimique quantitative - Partie 15: Textilien - Quantitative chemische Analysen - Teil 15:
Mélanges de jute avec certaines fibres animales Mischungen aus Jutefasern mit bestimmten tierischen
(méthode par détermination de la teneur en azote) Fasern (Bestimmung mittels Stickstoffgehalt) (ISO
(ISO 1833-15:2019) 1833-15:2019)
This European Standard was approved by CEN on 25 October 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 1833-15:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 1833-15:2019) 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 May 2020, and conflicting national standards shall be
withdrawn at the latest by May 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.
This document supersedes EN ISO 1833-15:2010.
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 1833-15:2019 has been approved by CEN as EN ISO 1833-15:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 1833-15
Second edition
2019-11
Textiles — Quantitative chemical
analysis —
Part 15:
Mixtures of jute with certain animal
fibres (method by determining
nitrogen content)
Textiles — Analyse chimique quantitative —
Partie 15: Mélanges de jute avec certaines fibres animales (méthode
par détermination de la teneur en azote)
Reference number
ISO 1833-15:2019(E)
©
ISO 2019
ISO 1833-15:2019(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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
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 2019 – All rights reserved
ISO 1833-15:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Sampling and pre-treatment of laboratory test sample . 2
7.1 Sampling . 2
7.2 Pre-treatment of laboratory test sample . 2
8 Test procedure . 3
9 Calculation and expression of results . 4
10 Precision . 4
ISO 1833-15:2019(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 docume
...