棉花中植物性的杂质(如叶、茎、壳、皮)会影响轧花和纺织的效率和品质。美国农业部根据棉花杂质光谱的不同开发了一个关于杂质分类的光谱数据库。傅立叶变换红外光谱特征表明,在轧花和纺织过程杂质会发生物理变化,如杂质变小和加热处理。加热和杂质大小显著影响傅立叶变换红外 Botanical impurities (such as leaves, stems, shells, skins) in cotton can affect the efficiency and quality of ginning and weaving. USDA has developed a spectral database on impurity classification based on the different impurity spectra of cotton. Fourier transform infrared spectroscopy features show that physical changes occur in the ginning and textile impurities, such as smaller impurities and heat treatment. Heating and impurity size significantly affect Fourier transform infrared