Study on Model Transfer of Fourier Transform Infrared Spectrometer Based on Wavenumber Calibration

Fourier transform infrared spectrometer (FTIR) is used in various fields because of its advantages such as fast scanning speed, high resolution, high wavenumber accuracy, high sensitivity and wide spectral range. However, in practical applications, the calibration model established on one instrument cannot be extended to other long-term instruments due to the differences between instruments, the changes of instruments with time, and the characteristics of samples. As a result, the application of FTIR is limited by the correction model. Therefore, how to realize the wavenumber correction of the whole machine and to further realize the model transfer is one of the important research contents of the application of instrument. The wavenumber of the spectrum of the whole machine was corrected by the peak point of the water peak under the condition of high-resolution test. The results showed that the accuracy and consistency of wavenumbers are important factors for model transmission, and is beneficial to the application and development of FTIR.