Results can therefore be numerically quantified. The units of measurement are usually expressed as Absorbance Units . It is probably useful for the layman to treat infrared analysis as the chemistry of Carbon, Hydrogen, Oxygen, Nitrogen and Sulfur. And the various combinations in which these elements configure or attach themselves. By identifying and quantifying certain functional groups one can derive highly dependable information about the lube, whether new or used.
Most lubes consist of two major components, base stock and additive.
It is possible to distinguish between differing base stocks with IR for the purpose of quality control. The feature is particularly useful for assurance that a synthetic lube is not being inadvertently contaminated with mineral oil, thereby impairing the synthetic s beneficial properties. This is part of the routine infrared inspection. It can determine if the lubes contain additives and if the additives are effective. This is not a difficult process provided the lab is familiar with the product being tested.