Method for determining the content of diesel fuel in a...

Details Method for determining the content of diesel fuel in a... Method for determining the content of diesel fuel in a...

2006-10-26

2009-11-03

Wallenhorst, Maureen M (Department: 1797)

Chemistry: analytical and immunological testing

Lubricant, grease, mineral oil, hydrocarbon oil product, or...

C436S139000, C436S141000, C436S161000, C702S022000, C702S023000, C702S032000, C073S019020, C073S023220

Reexamination Certificate

active

07611901

ABSTRACT:
A method for determining proportion of diesel fuel in a lubricating oil of a combustion engine, including: forming a mixture containing an oil sample and a C5hydrocarbon such as a C5alkane; injecting the mixture into the injector of a gas chromatograph; establishing a chromatograph of the sample; determining a first parameter M representative of the area of a peak associated with the C5hydrocarbon such as a C5alkane; determining a second parameter C representing of the area of at least one peak associated with a hydrocarbon representative of diesel fuel; and determining the proportion T of diesel fuel by a formulaT=C/(M)-bain which a and b are constants defining equation y=ax+b of a calibration straight line of the ratio between the second and the first parameters as a function of the proportion of diesel fuel.

REFERENCES:
patent: 2003/0194811 (2003-10-01), Reischman et al.
Ruppel et al. Perkin Elmer Field Application Report, Gas Chromatography, “A Novel Method for High-Speed Determination of Fuel Diluents in Lubricating Oils”, 2005, pp. 1-3.
Anonymous, “Standard Test Method for Diesel Fuel Diluent in Used Diesel Engine Oils by Gas Chromatography1”, ASTM International, Designation: D 3524-04, pp. 1-6, 2004. XO009067885.
Anonymous, “Determination of Readily Volatile Components in Used Automotive Engine Oils by Gas Chromatography”, DIN 51380, pp. 1-2, 1990. XP009068152.

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