Direct determination of leather fat by near infrared reflectance spectroscopy

摘要

A new method for the direct quantification of the fat content of leather based on near infrared diffuse reflectance spectrometry (NIRRS) and multivariate calibration was developed. Wet-blue cow hide samples (15 for calibration and 10 for prediction) containing 0-13/100 fatty matter were prepared for this purpose. Spectra were recorded by using fibre optics and rotary cuvettes, and the spectral information acquired Was processed by stepwise multiple linear regression (SMLR) and partial least-squares regression (PLSR).