纺织材料.定量化学分析.第6部分:粘胶纤维或特定类型铜氨纤维或高温模量粘胶纤维或溶解性纤维素纤维和棉纤维的混合物(使用蚁酸和氯化锌法)

[中文适用范围]： 本文件规定了一种使用甲酸和氯化锌混合物来测定纺织品中粘胶纤维、某些类型的铜氨纤维、莫代尔纤维或莱赛尔纤维质量百分比的方法（需先去除非纤维物质），该纺织品是由粘胶纤维、某些类型的铜氨纤维、莫代尔纤维或莱赛尔纤维与棉花混纺而成的。本文件最初是专门为粘胶纤维、某些类型的铜氨纤维、莫代尔纤维或莱赛尔纤维与棉花的混合物而制定的，也适用于与聚丙烯、弹性烯烃和密胺的混合物。重要提示：如果发现存在铜氨纤维、莫代尔纤维或莱赛尔纤维，需进行初步测试，看其是否在试剂中溶解。该方法不适用于棉花遭受严重化学降解的混合物。当粘胶纤维、铜氨纤维、莫代尔纤维或莱赛尔纤维因某些无法完全去除的永久性整理剂或活性染料的存在而溶解不完全时，该方法也不适用。 [外文原描述]： This document specifies a method, using a mixture of formic acid and zinc chloride, to determine the mass percentage of viscose, certain types of cupro, modal or lyocell, after removal of nonfibrous matter, in textiles made of mixtures of — viscose, certain types of cupro, modal or lyocell, with — cotton. This document has been initially specifically established for mixtures of viscose, certain types of cupro, modal or lyocell with cotton, it is also applicable to mixtures with polypropylene, elastolefin and melamine. IMPORTANT — If a cupro or modal or lyocell fibre is found to be present, a preliminary test is carried out to see whether it is soluble in the reagent. The method is not applicable to mixtures in which the cotton has suffered extensive chemical degradation. It is not applicable when the viscose, cupro, modal or lyocell fibre is rendered incompletely soluble by the presence of certain permanent finishes or reactive dyes that cannot be removed completely.