Rolling oil is an important auxiliary material in the production process of aluminum plates, strips, and foils, which directly affects the operation of the process and the quality of the final product. The additive content in rolling oil is also an important indicator of rolling oil. The additives of rolling oil are mainly composed of acids, alcohols, esters, etc., all of which have oxygen-containing substituents (carboxyl, hydroxyl, and ester groups, respectively). The characteristic absorption peaks of the three do not interfere with each other and are not affected by the background (base oil). According to Lambert Beer's law, the working curve of the concentration and absorbance of each component can be obtained. The absorbance of each absorption peak in the sample spectrum can be accurately calculated to determine the concentration of each component in the additive.

Using the ican9 Fourier transform infrared spectrometer to determine the additive content in rolling oil can achieve fast and accurate results, while avoiding the disadvantages of large errors, cumbersome steps, and high costs (consuming a large amount of reagents) in chemical methods.