ISSN: 1546-962X
Page Count: 19

Analysis of the Volatiles Generated During the Selby-Noack Test by ³¹P NMR Spectroscopy
Bosch, RJ
Technical Service Fellow and Technology Fellow, Astaris LLC, Missouri

Fee, DC
Director of R&D, Savant, Inc., Michigan

Selby, TW

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.

Keywords:
phosphorus volatility, exhaust catalyst, exhaust emissions, ZDDP, zinc dithiophosphates, Phosphorus Emission Index, PEI, 31P NMR, NMR spectroscopy

Paper ID: JAI12984
DOI: 10.1520/JAI12984
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