"Analysis of the Volatiles Generated During the Selby-Noack Test by 31P NMR Spectroscopy"
Author: R.J. Bosch, D.C. Fee, and Theodore Selby
Presented at ASTM Symposium on Elemental Analysis of Fuels & Lubricants, Tampa, FL, 20042005 Journal of ASTM International, October 2005, JAI 12984
Written by R. J Bosch, D.C. Fee, Astaris LLC, and T.W. Selby, Savant Inc.
Abstract: A series of engine oil samples collected during a study of their Phosphorus Emission Index (PEI) 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 compare these species to those found in the fresh oil and the residual oil remaining after the volatility test.