Results are reported of a round trial on the analysis of mohair/wool blends by scanning electron microscopy conducted under the auspices of the International Mohair Association. The identification of the fibers in a blend is based on the pronounced difference in the cuticle scale height at the distal edge for mohair and wool fibers which is readily detected in the scanning electron microscope. Twenty-one samples were analyzed by three laboratories. The results show good agreement between reference and analysis results and indicate that the major component of the analysis error is the random error inherent to the microscopical approach to fiber analysis.
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References
1.
American Society for Testing and Materials , Standard Practice for Establishing Consistent Test Method Tolerances, Method D4356-84, Annual Book of ASTM Standards 07.01, 1078-1093, (1984 ).
2.
DIN 1319 ( Blatt 3)-1972, Grundbegriffe der Meβtechnik; Begriffe für die Fehler beim Messen, DIN-Taschenbuch, Vol. 22, pp. 106-116, Beuth-Vertrieb GmbH, Berlin-Köln-Frankfurt, 1974.
3.
Dobb, M.G., Johnston, F.R., Nott, J.A., Oster, L.Sikorski, J., and Simpson, W.S., Morphology of the Cuticle Layer in Wool Fibers and Other Animal Fibers , J. Textile Inst. 52, T153-T170 ( 1961).
4.
EEC Working Party on Textile Names and Labeling— Analysis, EEC Inter-Laboratory.Tests on Methods of Analysis of Fiber Mixtures, J. Textile Inst.79, 155-188 (1988).
5.
Gallico, L., Rapport sur les résultats des Essais Interlaboratoires (Réunion de Pais, January 25-27, 1982), in "Proc. IWTO Technical Committee, Venice ," June 1982.
6.
International Wool Textile Organization, Die Bestimmung de Faserdurchmessers von Wolle (Mikroprojektionsmethode), Nr. IWTO-8-66, Int. Wool Secretariat, Res. Dep., London, 1966.
7.
Kadikis, A., Comments on "Quantitative Fiber Mixture Analysis by Scanning Electron Microscopy ," Textile Res. J.57. 676-677 (1987).
8.
Kusch, P., and Arns, W., Rasterelektronenmikroskopische Unterscheidung von Schafwolle und Ziegenhaar (z.B.Mohair), Melliand Textilber.64, 427-429 ( 1983).
9.
Kusch, P., and Stephani, G., Quantitative Bestimmung von Tierhaaren in Mischung mit Wolle und Synthesefasem , Schriftenr. Dtsch. Wollf. Inst. 96, ( 1984).
10.
Parisot, A., The Analysis of Fiber Mixtures Containing Wool/Mohair and Wool/Cashmere, IWTO Meeting with ASTM Subcommittee A-3 on Wool Fibers at the USDA; report nr. 4, Beltsville, Maryland, U.S.A., June 1971.
11.
Schiavone, R., EEC Inter-laboratory Tests on Methods of Analysis of Fiber Mixtures, Reply, J. Textile Inst.80, 619-620 (1989).
12.
Taylor, K.J., "Quality Assurance of Chemical Measurements," Lewis PublishersInc., Chelsea, USA, 1987.
13.
Wildman, A.B., "The Microscopy of Animal Textile Fibers," Wool Industry Research Association, Leeds, England, 1954.
14.
Wortmann, F.-J. , and Arns, W., Quantitative Fiber Mixture Analysis by Scanning Electron Microscopy, Part I: Blends of Mohair and Cashmere with Sheep's Wool , Textile Res. J.56, 442-446 (1986).
15.
Wortmann, F.-J. , and Arns, W., Untersuchungen zu den Schuppcnkantenhöhenverteilungen von Wolle und edlen Tierhaaren, Schriftenr. Dtsch. Wollf. Inst.102, 89-97 (1988).
16.
Wortmann, F.-J. , Wortmann, G., and Arns, W., Quantitative Fiber Mixture Analysis by Scanning Electron Microscopy, Part II: Blends of Wool with Angora Rabbit Hair, Textile Res. J.59, 73-80 (1989).
17.
Wortmann, F.-J. , Zahn, H., and Höcker, H., Comments on EEC Inter-laboratory Tests on Methods of Analysis of Fiber Mixtures, J. Textile Inst.80, 617-619 ( 1989).
