Abstract
A new method is proposed for the computerized determination of sulfur in diesel fuel by capillary gas chromatography with a flame photometric detector (FPD). The diesel fuel is injected in the gas chromatograph after dilution with n-hexane. After recording the chromatogram, the sulfur content in the diesel fuel (mg L−1 or w/w) is given directly by an integrator provided with a Basic card or by a personal computer in which the algorithm of the calibration curve has been entered. Use of a calibration curve does not require the identification of the numerous sulfur compounds present in diesel fuel. The calibration curve was corrected for the quenching effect that the hydrocarbon components of the diesel fuel produce on the detector response. The method was tested using diesel fuel with a known sulfur concentration and was found to be very accurate; it is reproducible, fast and may be automated.
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