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Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
40, Number 3, March 2002, pp. 127-132
Semiquantitative Determination of Short-Chain Fatty Acids in
Cane and Beet Sugars
Rebecca B. Batista and Casey C. Grimm
USDA-ARS-SRRC, 1100 Robert E. Lee Blvd., New Orleans, LA 70124
Mary An Godshall
Sugar Processing Research Institute, Inc., 1100 Robert E. Lee Blvd., New Orleans,
LA 70124
Some sugars, specifically white beet sugar and raw cane sugars,
possess off-flavors and off-odors. Although not necessarily the source, the
presence of short-chain fatty acids serves as an indicator of an off-odor problem
in sugar. Solid-phase microextraction (SPME) is used to collect the volatile
compounds from the headspace of sugar. The temperature, moisture, and type of
SPME fiber are varied to optimize recovery. Sugars analyzed in the absence of
water using an incubation temperature of 70°C with a divinylbenzene–carboxen–polydimethylsiloxane
fiber yield the most reproducible results. Data from depletion analyses report
a recovery level of 38% for the first injection. The semiquantitative analysis
of butyric acid is accomplished using injected standards to develop a calibration
curve.
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