Accreditation and Quality Assurance

, Volume 20, Issue 4, pp 239–245 | Cite as

Long-term (2001–2012) study of a proficiency testing scheme for textiles

Practitioner's Report
  • 148 Downloads

Abstract

The official methods for the quantitative chemical analysis of binary mixtures of textile fibres are an effective tool with which the market surveillance authorities can detect frauds. It is possible to analyse the correlation between the composition determined in the laboratory and that supplied by those responsible for the product. In order to guarantee the technical competence in this field, a proficiency testing scheme was provided by the Galician Laboratory of consumer products. The aim of this study was to compare the results obtained over the years from 2001 to 2012 and to evaluate the changes in the number of participants. The involvement of laboratories since 2001 on this proficiency testing has experienced a positive trend; up to 34 laboratories have had the opportunity to compare their results and to evaluate their performance. Therefore, in parallel with this fact, in 2012 a larger number of laboratories obtained a successful participation in comparison with 2001. The number of participating laboratories is increasing, but in most of the rounds it is still insufficient to consider negligible the standard uncertainty of the assigned value. Furthermore, the number and experience of the laboratories may affect, among other factors, the assigned value that is obtained by consensus and thus may affect the performance evaluation.

Keywords

Proficiency testing scheme Textile Quantitative chemical analysis Binary mixtures z-Score 

References

  1. 1.
    Regulation (EU) No 1007/2011 (2011) of the European Parliament and of the Council of 27 September 2011 on textile fibre names and related labelling and marking of the fibre composition of textile products and repealing Council Directive 73/44/EEC and Directives 96/73/EC and 2008/121/EC of the European Parliament and of the Council. Off J Eur Union L272:1–64Google Scholar
  2. 2.
    ISO/IEC 17025 (2005) General requirements for the competence of testing and calibration laboratories. International Organization for Standardization, GenevaGoogle Scholar
  3. 3.
    CGA-ENAC-LEC, Rev. 5 (2009) General criteria for accreditation of testing and calibration laboratories according to UNE-EN ISO/IEC 17025. ENACGoogle Scholar
  4. 4.
    ISO 1833-3 (2006) Textiles. Quantitative chemical analysis—part 3: mixtures of acetate and certain other fibres (method using acetone). International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
  5. 5.
    ISO 1833-4 (2006) Textiles. Quantitative chemical analysis—part 4: mixtures of certain protein and certain other fibres (method using hypochlorite). Geneva, Switzerland: International Organization for StandardizationGoogle Scholar
  6. 6.
    ISO 1833-7 (2006) Textiles. Quantitative chemical analysis—part 7: mixtures of polyamide and certain other fibres (method using formic acid). Geneva, Switzerland: International Organization for StandardizationGoogle Scholar
  7. 7.
    ISO 1833-11 (2006) Textiles. Quantitative chemical analysis—part 11: mixtures of cellulose and polyester fibres (method using sulfuric acid). International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
  8. 8.
    ISO/IEC Guide 43-1 (1997) Proficiency testing by inter-laboratory comparisons—part 1: development and operation of proficiency testing schemes. International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
  9. 9.
    ISO/IEC 17043 (2010) Conformity assessment—general requirements for proficiency testing. International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
  10. 10.
    ISO 13528 (2005) Statistical methods for use in proficiency testing by inter-laboratory comparisons. International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
  11. 11.
    ISO 5725-1 (1994) Accuracy (trueness and precision) of measurement methods and results—part 1: introduction and basic principles. International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
  12. 12.
    ASTM D6674-01 (2013) Standard Guide for Proficiency Test Program for FabricsGoogle Scholar
  13. 13.
    ISO 5089 (1977) Textiles. Preparation of laboratory test samples and test specimens for chemical testing. International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
  14. 14.
    ISO 1833-1 (2006) Textiles. Quantitative chemical analysis—part 1: general principles of testing. International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Galician Laboratory of Consumer ProductsA CoruñaSpain

Personalised recommendations