ICP OPTICAL EMISSION SPECTROSCOPY APPLICATION NOTE 29 Oil Analysis Agnès Cosnier HORIBA Scientific Longjumeau, France Keywords: oil, wear metals, trend analysis 1 Introduction This Application Note describes a classical method for the analysis of lubricating oils. The spectrometric analysis of lubricating oil is com- mon practice where large amount of lubricating oils are involved or where engine wear is criti- cal. For example, it is used to control oil from planes, boats, buses, trains, and large automo- tives. The same oil is sampled over a period of time and analyzed, and by monitoring of the concentrations of the wear metals enables iden- tification engine component suffering wear. 2 Principle 2.1 Technique used The elemental analysis of solutions was under- taken by Inductively Cou

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