EN ISO 1833-25:2020 PDF

Name: EN ISO 1833-25:2020 — Textiles - Quantitative chemical analysis - Part 25: Mixtures of polyester with certain other fibres (method using trichloroacetic acid and chloroform) (ISO 1833-25:2020)
SKU: EN ISO 1833-25:2020
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Textiles - Quantitative chemical analysis - Part 25: Mixtures of polyester with certain other fibres (method using trichloroacetic acid and chloroform) (ISO 1833-25:2020)

Название (английский):

EN ISO 1833-25:2020

Textiles - Quantitative chemical analysis - Part 25: Mixtures of polyester with certain other fibres (method using trichloroacetic acid and chloroform) (ISO 1833-25:2020)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 22 июля 2020 г.
Издание:: CEN EN 1833 edition 2 version 1
ICS:: 59.060.01

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Описание (английский):

This document specifies a method using trichloroacetic acid and chloroform to determine the mass percentage of polyester fibres after removal of non-fibrous matter, in textiles made of mixtures of — polyester fibres with — aramid fibres (except polyamide imide), flame retardant (FR) viscose and polyacrylate.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 1833-25:2020 - Textiles - Quantitative chemical analysis - Part 25 specifies a chemical method to determine the mass percentage of polyester fibres in textile mixtures after removal of non‑fibrous matter. The method uses a trichloroacetic acid/chloroform reagent to dissolve polyester and quantify the remaining fibres. This edition (2020) supersedes the 2013 version and is endorsed by CEN.

Key topics and technical requirements

Scope: Applies to mixtures of polyester with aramid fibres (except polyamide imide), flame retardant (FR) viscose, and polyacrylate.

Principle: Dissolve polyester from a known dry mass of the specimen using a trichloroacetic acid/chloroform reagent; collect, wash, dry and weigh the insoluble residue; calculate polyester content by difference.

Reagents:

Crystallized trichloroacetic acid/chloroform reagent prepared at a mass ratio 1:1.
Alternative reagent: 15 g trichloroacetic acid filled to 100 g with chloroform.
Chloroform specified separately.

Apparatus: Use general apparatus from ISO 1833-1 plus a glass conical flask (min. 200 ml) with stopper and a weighed filter crucible.

Test procedure highlights:

Add 50 ml of reagent per gram of specimen, stopper and shake; allow to stand for 15 minutes, shaking intermittently.
Decant through a weighed filter crucible, wash with 100 ml reagent, transfer residues using reagent (5.2) and chloroform (5.3).
Dry, cool and weigh residue; inspect microscopically to confirm complete removal of soluble fibre.

Calculation: Follow ISO 1833-1 general instructions. The correction factor d = 1.00, except for polyacrylate where d = 1.01.

Precision: Confidence limits for homogeneous mixtures are ≤ ±1 percentage point at 95% confidence.

Safety: Chloroform and the reagent are harmful; strict safety precautions and compliance with local health/environment regulations are required.

Applications and users

Textile testing and quality control laboratories performing quantitative chemical analysis of textiles.

Manufacturers verifying fibre composition in blended fabrics.

Certification and standards bodies, forensic textile analysts and R&D groups comparing blend contents.

Useful when other fibres in the blend are insoluble in common solvents and polyester is the removable component.

Related standards

ISO 1833-1: General principles for quantitative chemical analysis of textiles.

ISO 1833-24: Alternative method for polyester mixtures (phenol and tetrachloroethane).

AATCC Fiber Analysis: Quantitative (referenced as an alternative resource).

Keywords: EN ISO 1833-25:2020, quantitative chemical analysis, textiles, polyester, trichloroacetic acid, chloroform, aramid, FR viscose, polyacrylate, fibre composition, textile testing.

EN ISO 1833-25:2020 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

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