GC Analysis of Aroma Fusel Alcohols in Brandy on Watercol™ 1910

GC Analysis of Aroma Fusel Alcohols in Brandy on Watercol™ 1910

Conditions

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 brandy
injection 1 µL, 100:1 split
liner 4 mm I.D., split/splitless type, wool packed single taper FocusLiner(TM) design (2633901)
inj. temp. 250 C
detector FID, 200 C; TCD, 200 C

Description

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 brandy 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
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suitability application for GC

Materials

     
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