In this paper,a wavelength selection-direct standardization(WSDS) algorithm was proposed for calibration transfer of NIR model.The WSDS is one of the modifications of direct standardization(DS).In WSDS,only the wavelengths which were highly correlated with the sample property were selected for correcting the variations of the instrumental responses of two different NIR spectrometers.The corrected spectroscopic data were then used to build the model for analysis.The application of WSDS algorithm to calibration transfer of NIR analysis was evaluated by analyzing the jet fuel with different NIR spectrometers.The results showed that after the WSDS correction,the squared error of prediction(SEP) of the density of jet fuel decreased from 0004 6 to 0001 2 and that of the viscosity(20 ℃) of jet fuel decreased from 0058 6 to 0020 9.The results showed that this method can well correct the difference between instruments and improve the analytical accuracy.The corrected results,obtained by WSDS,direct standardization(DS) and piecewise direct standardization(PDS),respectively,for jet fuel with different NIR spectrometers indicated that the former gave the best analytical accuracy.
关键词
近红外模型传递波长筛选直接校正法航空煤油
Keywords
near infraredcalibration transferwavelength selectiondirect standardizationjet fuel