DIN EN ISO 1833-21:2011 纺织品.定量化学分析.第21部分:含氯纤维,某些改性聚丙烯腈纤维,某些弹性纤维,醋酯纤维,三醋酯纤维与某些其他纤维的混合物(环已酮法)(ISO 1833-21-2006);德文版本EN ISO 1833-21-2010
Textiles - Quantitative chemical analysis - Part 21: Mixtures of chlorofibres, certain modacrylics, certain elastanes, acetates, triacetates and certain other fibres (method using cyclohexanone) (ISO 1833-21:2006); German version EN ISO 1833-21:2010