Utilize the frequency doubling or combined frequency of the stretching vibration of hydrogen-containing group chemical bonds to obtain the absorption spectrum in the near-infrared region through transmission or reflection, and establish automotive diesel products through modern chemometrics methods such as principal component regression and partial least squares methods. The linear or nonlinear relationship (calibration model) between the near-infrared spectrum and its quality index can be used to realize the use of spectral information to determine the polycyclic aromatic hydrocarbon content, freezing point, cold filter point, cetane number and cetane index of the sample to be tested. Quick analysis.
T/CPCIF 0185-2022 history
2022T/CPCIF 0185-2022 Rapid analysis method of automobile diesel fuels— Near infrared spectrometry