This is a poster presentation. Near infrared (NIR) spectroscopy is now recognised worldwide as technology appropriate for industrial quality and process control. NIR is used not only for quantitative analysis but also for identification of materials anywhere in the formulation process: raw materials, intermediates, and finished products. Additives for lubricants like oxidation inhibitors, corrosion inhibitors, and metal deactivators are highly specialised chemicals. Their function is an important part of the lubricant behavior. Some are readily distinguished because their NIR spectra are different. Similar compounds with nearly identical NIR spectra require special chemometric treatment in order to identify them as a proper substance. These same chemometric methods can be used to qualify the material as the specified grade and quality. Water soluble cooling lubricants are used in the metal working industry. The durability of the lubricant in process depends on the amount of impurities by reaction products and hydraulic or other process oils. NIR spectroscopy can be used as quick and effective method to determine the whole oil content and oil impurities continuously (at line) within seconds. The inaccurate and time consuming reference method with the oil tester can be replaced. Along with all the usual benefits of NIR analysis, this identification and qualification method provides a more complete quality assurance program for lubricant production.
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