本文件规定了通过LC-MS测定动物毛发纤维共混物（由羊毛、羊绒、牦牛、羊驼、骆驼或安哥拉羊毛制成）组成的定性和定量方法，无需蛋白质还原。 注1非动物毛发纤维的组成可通过ISO 1833（所有部分）测量。将两个结果组合以确定总纤维组成。 根据ISO/TR 11827[4]，该方法基于光学显微镜对共混物中所有纤维的形态进行初步鉴定。如果存在相同动物物种的纤维（如羊绒和马海毛的混纺），则不适用。 注2:在这种情况下，使用显微镜分析[例如，ISO 17751(所有部分)]进行定量分析。

This document specifies a qualitative and quantitative procedure to determine the composition of animal hair fibre blends (made of wool, cashmere, yak, alpaca, camel or angora) by LC-MS without protein reduction. NOTE 1 The composition of non-animal hair fibres can be measured by ISO 1833 (all parts). Both results are combined to determine the total fibre composition. The method is based on a preliminary identification, by light microscopy, of all fibres in the blend on the basis of their morphology, according to ISO/TR 11827^[4]. It is not applicable if fibres of the same animal species (such as blends of cashmere and mohair) are present. NOTE 2 In this case, the quantitative analysis is performed using microscopical analysis [for example, ISO 17751 (all parts)].