Aplicación de la cromatografía de gases bidimensional en el análisis de derivados azufrados y nitrogenados en gasolina

The comprehensive two-dimensional gas chromatography (GC×GC) is used as a powerful tool for an improved characterization in sulphur and nitrogen speciation in gasoline. There are shown the results obtained of the connection between GC×GC and a specific detector, sulphur (SCD) and Nitrogen (NCD). This technique is based on the separation of two orthogonal dimensions, achieved by two chromatographic capillary columns with different polarity. The final chromatogram obtained was structured according to the volatility and polarity of hydrocarbons which facilitates its identification. The results are a very promising alternative in the characterization of these types of compounds in middle distillates. This work illustrates the high resolution power of the GC×GC in combination with a selective detection of sulphur or nitrogen compounds in gasoline when a specific detector is used.