METHOD FOR QUANTITATIVELY DETERMINING DETERGENT FUEL ADDITIVES IN FUEL SAMPLES

摘要

11 Fuel additives in vehicle fuel samples are quantitatively determined by gel permeation chromatography (GPC). The vehicle fuel necessarily includes a detergent additive which is usually one component of a multi-component additive package (e.g., which also contains a carrier and a solvent for the detergent). Samples of the detergent additive-containing vehicle fuel are thus subjected to gel permeation chromatography by injection of the fuel sample into a mobile phase of the GPC system in this regard, the mobile phase of the GPC system will have a viscosity which is substantially the same as the viscosity of the fuel sample so that the fuel sample may be injected directly (i.e., without first being diluted). A chromatogram is thus obtained having identifiable (and hence quantifiable) bands indicative of the detergent additive component.