STP1468: 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


    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, 31, P NMR, NMR spectroscopy


    Paper ID: STP12009S

    Committee/Subcommittee: D02.03

    DOI: 10.1520/STP12009S


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