Contact:
(203) 744-5905
1H and 13C Analysis of Residues (Gasoline/Diesel/Lubricants)
Using various preperative techniques (dialysis, evaporation under nitrogen blanket, washing with a solvent series of differing polarity) samples can be prepared for NMR analysis that can yield information on the following:
Additive
Chemistry - PIB amines, polyether based detergents (molecular
structure and size can be determined), carrier fluids, emulsifiers, cetane
enhancer.
Blow-by severity can
be deduced from aromatic content observed by NMR.
In lubricants additive chemistry can be observed -
Ethylene propylene VI
improver can be observed and backbone sequence deduced (E-P ratio, block
size distribution).
Anti wear chemistry
can be deduced (ZnDTP, MoDTP)
PIB dispersency can
be observed - discrepancies in PIB content can lead to information on blow
by from fuel side of piston.
In used oils presence
of fuel additives can be observed and viscosity issues with used oils can be
equated to presence of these additives.
Solvent-series washed additives can be "reverse engineered" to yield important information on various additive structure as as well as relative quantitation.
An example of what can be observed by evaporating gasoline samples is shown below. The two gasolines were supposed to be identical - the NMR analysis showed serious differences in the heavy aromatic components present in the sample. Differences in additive treat level (PIB detergent with propylene oxide based fluidizer) were also observed.
For more information on this topic please contact:
Manager, Process and Analytical NMR Services
Process NMR Associates LLC,
87A Sand Pit Rd
Danbury, CT 06810, USA
Tel: (203) 744-5905