New lubrication oil quality spectrum rapid determination method

The invention discloses a new lubrication oil quality spectrum rapid determination method, which comprises the following steps: (1) collecting representative lubrication oil samples as a training set; (2) determining the infrared spectrum of the training set sample; (3) selecting an appropriate variable optimum technique to preferably select appropriate characteristic wavelengths and establishinglinear regression equation between each quality index and the characteristic wavelength by taking the absorbance of the characteristic wavelength as a variable; and (4) firstly determining the infrared spectrum of an unknown lubrication oil sample for quality test, selecting the absorbance of the same characteristic wavelength and determining each quality index of the lubrication oil by the established linear regression equation. The method can rapidly determine the chemical composition content, physical and chemical properties and 21 quality parameters of major elements and additive elements, the analysis speed is high, the operation is simple, and the quality monitoring capability of the lubrication oil is improved.