This paper presents a two-dimensional gas chromatography system based on a simplified Deans switch design, used to analyze the alcohol content in denatured fuel grade ethanol. The two-dimensional gas chromatography application completes this analysis 10 times faster than the standard ASTM D5501 method without the use of cryogenic oven cooling. This easy-to-use system also provides high qualitative and quantitative precision for this measurement.
This document details an application for determining the purity of denatured fuel ethanol using two-dimensional gas chromatography (2-D GC). The method utilizes an Agilent 6890N GC system equipped with a Deans switch to separate methanol and ethanol from hydrocarbon denaturants much faster than standard ASTM methods.
| Primary Column | HP-1 column, 0.25 um film, 15 m x 0.25 mm id |
|---|---|
| Secondary Column | INNOWax column, 0.25 um film, 15 m x 0.25 mm id |
| Oven Start Temperature | 70 °C |
| Oven Final Temperature | 225 °C |
The two-dimensional gas chromatography application completes the analysis 10 times faster than the standard American Society for Testing and Materials D5501 method.
No, this method does not require the use of cryogenic oven cooling.
The chromatographic run is completed in less than 7 minutes using this technique.