GC Analysis for Aroma Fusel Alcohols in Tequila on Watercol™ 1910

GC Analysis for Aroma Fusel Alcohols in Tequila on Watercol™ 1910


column Watercol 1910, 30 m x 0.25 mm I.D., 0.20 µm; two identical columns installed in the same inlet, each going to a separate detector (29711-U)
oven 50 °C (1 min), 5 °C/min to 180 °C (3 min)
carrier gas helium, 25 cm/sec (measured in each column at an oven temperature of 125 °C)
sample neat tequilla
injection 1 µL, 100:1 split
liner 4 mm I.D., split/splitless type, wool packed single taper FocusLiner™ design
inj. temp. 250 °C
detector FID, 250 °C; TCD, 200 °C


Analysis Note Fusel alcohols are by-products of the fermentation process. Four of these (n-propanol, isobutanol, active amyl alcohol, and isoamyl alcohol) are important to alcoholic beverage manufacturers due to their aroma characteristics.

The "Watercol" series of ionic liquid capillary GC columns are characterized by their ability to produce a sharp peak shape for water, sharp enough so that water can be integrated and quantified. Sharp peak shapes are also produced for many other small polar analytes, such as the four aroma fusel alcohols.

In this application, a tequila sample was analyzed for the presence of aroma fusel alcohols. As shown, great peak shapes were obtained, resulting in good resolution. In addition to sharp fusel alcohol peaks, the column′s selectivity results in elution of both ethanol and water free from all analytes.
Featured Industry Food and Beverages
Legal Information Watercol is a trademark of Sigma-Aldrich Co. LLC
suitability application for GC


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