| Autor: |
Batista RB; USDA-ARS-SRRC, New Orleans, LA 70124, USA., Grimm CC, Godshall MA |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of chromatographic science [J Chromatogr Sci] 2002 Mar; Vol. 40 (3), pp. 127-32. |
| DOI: |
10.1093/chromsci/40.3.127 |
| Abstrakt: |
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 degrees 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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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