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GC Analysis of Aroma Fusel Alcohols in Tennessee Whiskey on Watercol 1910

GC Analysis of Aroma Fusel Alcohols in Tennessee Whiskey on Watercol™ 1910 suitable for GC

Materials

analytical column

Product No.
Description
Pricing

Watercol 1910 Capillary GC Column

L × I.D. 30 m × 0.25 mm, df 0.20 μm

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)

inj. temp.

250 °C

detector

FID, 200 °; TCD, 200 °C

carrier gas

helium, 25 cm/sec (measured in each column at an oven temperature of 125 °C)

injection

1 μL, 100:1 split

liner

4 mm I.D., split/splitless type, wool packed single taper FocusLiner design (2879925-U)

sample

neat Tennessee whiskey

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 Tennessee whiskey 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.

Legal Information

FocusLiner is a trademark of SGE Analytical Science Pty Ltd.
Watercol is a trademark of Sigma-Aldrich Co. LLC