[Application of DS algorithm to the calibration transfer in near-infrared spectroscopy]

Calibration transfer in multivariate calibration is one of the most important and key issues in near-infrared spectral analysis technology. The model was transferred by means of finding the transformation relation between two instruments of the same type, so that the model established on one instrument could be used on the other to predict the spectral response. In this paper, direct standardization (DS) algorithm was investigated for resolving calibration transfer in multivariate calibration of chemometrics. In addition, the selection method for the transfer set samples was studied in this paper. The experiment of model transfer was carried out between two AOTF near-infrared spectrometers. Firstly, the Kennard/Stone algorithm was adopted to select the transfer set samples, and then DS algorithm was applied to the calibration transfer. The experimental results showed that DS algorithm was effective for model transfer. DS algorithm is applicable to not only instrument standardization, but also the correction of the spectral differences induced by baseline drift for a long time or the replacement of measurement modules for the same instrument.