FAST DETERMINATION OF ACIDITY AND OTHER PROPERTIES OF DIESEL BY INFRARED SPECTROSCOPY

Abstract

Abstract: To fast determine the acidity and other properties of the automotive diesel, the attenuated total reflection sample cell was used to obtain the infrared spectra of the samples. The IR spectra were further analyzed with partial least squares (PLS) to establish four calibration models, which were used to determine the acidity, density, flash point and freezing point of diesel fuel samples. The validation standard errors were 0.46 mg/(100 mL), 0.77 kg/m3, 2.60 ℃ and 2.77 ℃, respectively. The method meets the requirements of the reproducibility of standard method. Compared with the standard method, the new established method showed the advantages of no pretreatment, simpler process, shorter test time and better repeatability.

Key words: automotive diesel fuel, acidity, partial least squares, infrared spectroscopy, density, flash point, freezing point

CLC Number:

References

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