Abstract:The spectra of the inner capsule and outer skin of different-age Citri Reticulatae Pericarpium were obtained using a grating portable near-infrared spectrometer.The identification models of the different-age Citri Reticulatae Pericarpium were established using spectral pretreatment methods combined with different pattern recognition methods.The preprocessing method can effectively eliminate the interferences in the spectra.Accurate identification performance of different-age Citri Reticulatae Pericarpium could not be achieved using only the principal component analysis method.The best identification accuracy of 35% was obtained using the outer skin data，while the best identification accuracy of 44% was obtained using the inner capsule data.More accurate identification results were obtained through soft independent modeling of class analogy.The best identification accuracy of 94% was obtained using the outer skin data，whereas the best identification accuracy of 96% was obtained using the inner capsule data.The Fisher linear discriminant analysis results were the best.I－dentification accuracy of 98% was obtained using the outer skin data，whereas identification accuracy of 100% was obtained using the raw spectra data of the inner capsule.The above results show that the grating portable near-infrared spectrometer combined with the chemometrics method can achieve the nondestructive identifica－tion of different-age Citri Reticulatae Pericarpium.