Measurement of purity index in textile based on IR spectroscopy

This paper describes the measurement of purity index of textile. The measuring system used in this study was Fourier transformed infrared spectroscopy. Two kinds measuring method were tested One was diffuse reflectance method and the other was optical fiber probe method. Human lipid dirt and sweat on sample cotton pieces was used by forehead wiping. After qualitative study of the human dirt by using infrared spectrum, PLS regression calibration was carried out to measure the content of the dirt elements. This paper also describes the parameters of the optimum PLS calibration model.