ISO 1833-12:2020 PDF

Textiles — Quantitative chemical analysis — Part 12: Mixtures of acrylic, certain modacrylics, certain chlorofibres, certain elastane fibres with certain other fibres (method using dimethylformamide)

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Title (English):

ISO 1833-12:2020

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 4
Publication date:: October 5, 2020
Edition:: ISO IS 1833 edition 3 version 1
ICS:: 59.060.01

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Description (English):

This document specifies a method, using dimethylformamide, to determine the mass percentage of acrylic, modacrylic, chlorofibre or elastane, after removal of non-fibrous matter, in textiles made of mixtures of — acrylic, certain modacrylics, certain chlorofibres, certain elastane fibres with — wool, animal hair, silk, cotton, viscose, cupro, modal, lyocell, polyamide, polyester, polypropylene, elastomultiester, elastolefin, melamine, polypropylene/polyamide bicomponent, polyacrylate or glass fibres. It is not applicable to animal hair, wool and silk dyed with chromium based mordant dyes. NOTE Dyestuff identification is described in ISO 16373-1.

Technical details

Technical committee: ISO/TC 38 - Textiles
SKU: ISO 1833-12:2020

Abstract

Overview

ISO 1833-12:2020 - Textiles - Quantitative chemical analysis - Part 12 specifies a chemical-solvent method using dimethylformamide (DMF) to determine the mass percentage of acrylic, certain modacrylics, certain chlorofibres or certain elastane in textile blends. The method applies after removal of non‑fibrous matter and covers mixtures of these fibres with common natural and synthetic fibres (wool, animal hair, silk, cotton, viscose, cupro, modal, lyocell, polyamide, polyester, polypropylene, elastomultiester, elastolefin, melamine, polypropylene/polyamide bicomponent, polyacrylate or glass). It is not applicable to animal hair, wool or silk dyed with chromium‑based mordant dyes.

Keywords: ISO 1833-12:2020, textiles, quantitative chemical analysis, dimethylformamide, acrylic, elastane, chlorofibres.

Key topics and requirements

Principle: target fibres are dissolved in DMF at 90–95 °C; the insoluble residue is collected, washed, dried and weighed. The percentage of dissolved fibres (acrylic/modacrylic/chlorofibre/elastane) is obtained by difference.
Reagent: dimethylformamide (DMF) with ≤ 0.1% water; note the reagent’s boiling point (~152–154 °C) and the required safety precautions due to its toxicity.
Apparatus: glass conical flask (≥200 ml), water bath (maintain 90–95 °C), weighed filter crucible and suction filtration as described in ISO 1833-1.
Test procedure: typical dosing is 100 ml DMF per g specimen, heat 1 h with intermittent shaking, followed by a further 60 ml and 30 min heating; filter, wash (hot water 70–80 °C), dry and weigh residue.
Calculation: follow ISO 1833-1 general instructions; the method uses a correction factor d = 1.00 (with d = 1.01 for several fibres including wool, cotton, viscose, polyamide, polyester, melamine and polyacrylate).
Precision: confidence limits not greater than ±1 percentage point at the 95% confidence level on homogeneous mixtures.
Limitations: perform preliminary solubility checks for certain modacrylics/chlorofibres/elastanes; not suitable for chromium‑mordanted wool/ silk/animal hair.

Applications and users

Quality control laboratories verifying textile composition and label claims
Textile manufacturers and converters for incoming material inspection and process control
Testing laboratories supporting regulatory compliance, procurement and claims verification
Product development and R&D for blend formulation and recycling stream characterization
Forensic textile analysis where quantitative fibre composition is required

SEO phrases: textile testing, fibre composition analysis, solvent extraction method, DMF textile test, ISO textiles standard.

Related standards

ISO 1833-1 - General principles for quantitative chemical analysis of textiles
ISO 1833-20 and ISO 1833-21 - Alternative solvent methods for elastane and related fibre mixtures
ISO 16373-1 - Dyestuff identification for coloured textiles

Safety note: DMF is hazardous-use appropriate ventilation, PPE and lab protocols.

Related standards

Standards mentioned in the description

Abstract

Overview

Keywords: ISO 1833-12:2020, textiles, quantitative chemical analysis, dimethylformamide, acrylic, elastane, chlorofibres.

Key topics and requirements

Principle: target fibres are dissolved in DMF at 90–95 °C; the insoluble residue is collected, washed, dried and weighed. The percentage of dissolved fibres (acrylic/modacrylic/chlorofibre/elastane) is obtained by difference.
Reagent: dimethylformamide (DMF) with ≤ 0.1% water; note the reagent’s boiling point (~152–154 °C) and the required safety precautions due to its toxicity.
Apparatus: glass conical flask (≥200 ml), water bath (maintain 90–95 °C), weighed filter crucible and suction filtration as described in ISO 1833-1.
Test procedure: typical dosing is 100 ml DMF per g specimen, heat 1 h with intermittent shaking, followed by a further 60 ml and 30 min heating; filter, wash (hot water 70–80 °C), dry and weigh residue.
Calculation: follow ISO 1833-1 general instructions; the method uses a correction factor d = 1.00 (with d = 1.01 for several fibres including wool, cotton, viscose, polyamide, polyester, melamine and polyacrylate).
Precision: confidence limits not greater than ±1 percentage point at the 95% confidence level on homogeneous mixtures.
Limitations: perform preliminary solubility checks for certain modacrylics/chlorofibres/elastanes; not suitable for chromium‑mordanted wool/ silk/animal hair.

Applications and users

Quality control laboratories verifying textile composition and label claims
Textile manufacturers and converters for incoming material inspection and process control
Testing laboratories supporting regulatory compliance, procurement and claims verification
Product development and R&D for blend formulation and recycling stream characterization
Forensic textile analysis where quantitative fibre composition is required

SEO phrases: textile testing, fibre composition analysis, solvent extraction method, DMF textile test, ISO textiles standard.

Related standards

ISO 1833-1 - General principles for quantitative chemical analysis of textiles
ISO 1833-20 and ISO 1833-21 - Alternative solvent methods for elastane and related fibre mixtures
ISO 16373-1 - Dyestuff identification for coloured textiles

Safety note: DMF is hazardous-use appropriate ventilation, PPE and lab protocols.

ISO 1833-12:2020 PDF

Technical details

Abstract

Overview

Key topics and requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Applications and users

Related standards

Related standards

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