By the process of the transmission infrared spectrum of the oil density

A process for the transmission infrared spectrum of the oil density, including (1) the various oil samples were collected, the density of the crude oil sample determined by standard methods, (2) IR spectrum of each sample of crude oil with a transmission mode, or two first order order differential processing, taking the absorbance at 750 1350cm 1-spectral region ~, create a calibration model using standard methods with the density of the crude oil sample measured using partial least squares, (3) crude oil sample tested was measured by the same measuring method of oil sample infrared spectrum, and a first or second order differential processing, the absorbance at 750 ~ 1350cm-1 spectral region, are substituted into the calibration model, a density of the crude oil samples tested. The small amount of sample test method is simple, fast, good accuracy of test results.