SEDL / STP / STP1468-EB / STP12009S

Analysis of the Volatiles Generated During the Selby-Noack Test by ³¹P NMR Spectroscopy

Bosch, RJ
Technical Service Fellow and Technology Fellow, Astaris LLC, Webster Groves, Missouri

Fee, DC
Technical Service Fellow and Technology Fellow, Astaris LLC, Webster Groves, Missouri

Selby, TW
Director of R&D, Savant, Inc., Midland, Michigan

Pages: 19    Published: Jan 2005

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Abstract

A series of engine oil samples collected during a study of their Phosphorus Emission Index values were analyzed by ³¹P Nuclear Magnetic Resonance Spectroscopy. (The PEI analyses themselves were presented in an associated paper [1]). NMR spectra were generated to obtain and explain the mode of formation and identity of the phosphorus-containing species in the volatiles generated during the Selby-Noack volatility test and to compare these species to those found in both the fresh oil and the residual oil remaining after the volatility test.