This document describes an optimized method for the analysis of sulfur and nitrogen compounds in gasoline- and diesel range materials. The analysis is performed using an Agilent 6890 gas chromatograph (GC) configured with an Agilent G2350A atomic emission detection (AED) system. A 30-m × 0.32-mm, 1-mmmmm HP-1 MS capillary column is used for separation. The method is applicable to low-sulfur gasoline and diesel fuels. Nitrogen compounds can also be determined. The method can be applied to other light gas oil fractions with final boiling points of approximately C25 (402 ºC, 756 ºF). The configuration meets the requirements for determining sulfur in gasoline by ASTM method D 5623. The procedure can be extended to also measure oxygenates, organolead, organomanganese, and fluorine compounds in gasoline and diesel fractions.
The document details an optimized method developed by Agilent Technologies for the analysis of sulfur, nitrogen, and other heteroatomic compounds (such as oxygenates, organolead, and fluorine) in gasoline- and diesel-range materials. The procedure utilizes Gas Chromatography coupled with Atomic Emission Detection (GC/AED).
The method is applicable to low-sulfur gasoline and diesel fuels, as well as other light gas oil fractions with final boiling points of approximately C25 (402 °C, 756 °F).
The system uses 179 nm for carbon, 181 nm for sulfur, 388 nm for nitrogen, 171 nm for oxygen, 261 nm for lead, 259 nm for manganese, and 690 nm for fluorine.
The makeup gas flow must be set to 230 mL/min when the high makeup flow valve turns on for nitrogen and metals analysis.