BS EN 17137:2018 pdf download

BS EN 17137:2018 pdf download.Textiles – Determination of the content of compounds based on chlorobenzenes and chlorotoluenes
1 Scope
This document specifies a method of analysis for determining the content of chlorobenzenes and chlorotoluenes in textile products made of components such as outer fabric, interlining, lining, plastic slide fasteners, plastic buttons, labels, threads and appliques.
The method applies to a mass fraction of 0,1 mg/kg to 10 mg/kg per single isomer. Both higher and lower concentrations can be determined if the mass of the sample is selected accordingly or if appropriate dilutions are made during the analysis.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
一IEC Electropedia: available at http://www.electropedia.org/
一ISO Online browsing platform: available at http://www.iso.org/ obp
3.1 component
individual part (one material) of the textile product sample
3.2 composite test specimen
test specimen composed from various sub-test specimens of components
4 Principle
The cut test specimen is extracted via ultrasonication in a closed vessel using dichloromethane.Interfering particles and fibres are removed by filtering through membrane filters. Without additional purification, the extract is analysed to determine the content of chlorobenzenes and chlorotoluenes by GC-MS with selected ion mode, using an internal standard for quantification.
5 Apparatus
5.1 Standard laboratory equipment.
5.2 Glass vials with tight closure.
NOTE Vial volumes of 40 ml to 100 ml have been found suitable.
5.3 Ultrasonic bath for extraction.
5.4 Analytical balance, resolution of at least 0,000 1 g.
5.5 Syringes with Luer Lock, 2 ml, with disposable syringe filters, made of polytetrafluoroethylene (PTFE) membrane.
NOTE
Pore size of 0,45 μm has been found suitable.
7.5 Calibration
Individual stock solutions are prepared for calibration of the reference substances (e.g. 10 mg to 10 ml of dichloromethane, mass concentration β = 1 mg/ml). Then a mixed standard is prepared (e.g. 1 ml of each stock solution to 100 ml of dichloromethane, mass concentration β = 10 μg/ml). This mixed calibration standard is used to prepare calibration solutions of various concentrations (e.g. 10, 50, 100,200, 400, 600, 800, 1 000 ng/ml). Finally 1 ml of each individual calibration solution is mixed with 10 μl of the internal standard solution (e.g. at concentration of 10μg/ ml) and analysed.