6533b856fe1ef96bd12b31cb

RESEARCH PRODUCT

Characterization of used mineral oil condition by spectroscopic techniques

Jukka AumanenJarmo VanhanenErkki KolehmainenJouko Korppi-tommolaTuula KerkkänenMarcus RinkiöPäivi Törmä

subject

Materials sciencebusiness.industryMaterials Science (miscellaneous)Analytical chemistryCarbon-13 NMRFluorescenceIndustrial and Manufacturing EngineeringFluorescence spectroscopyBlueshiftOpticsNuclear magnetic resonancemedicinesense organsBusiness and International ManagementTime-resolved spectroscopybusinessSpectroscopyMineral oilAbsorption (electromagnetic radiation)medicine.drug

description

Optical absorption, fluorescence, and quantitative 13C NMR spectroscopy have been used to study the degradation of mineral gearbox oil. Samples of used oil were collected from field service. Measured absorption, fluorescence, and quantitative 13C NMR spectra of used oils show characteristic changes from the spectra of a fresh oil sample. A clearly observable, approximately 20-nm blueshift of the fluorescence emission occurs during the early stages of oil use and correlates with changes in intensity of some specific 13C NMR resonance lines. These changes correlate with oil age because of the connection between the blueshift and breaking of the larger conjugated hydrocarbons of oil as a result of use.

yearjournalcountryeditionlanguage
2004-09-09Applied Optics
https://doi.org/10.1364/ao.43.004718