ANYL 34 |
| Furan, classified as a possible human carcinogen, has recently been reported to occur in thermally processed foods. Up to now, only a few data on its occurrence in foods are available. Therefore, we developed a quantitation method by means of solid phase microextraction (SPME) combined with a stable isotope dilution assay (SIDA) to collect data for various foods as well as for model systems to get a deeper insight into its formation pathway. Using SIDA, critical factors of SPME analysis like the extraction parameters (temperature, exposure time, and suppression of an analyte by other constituents) can be corrected. The developed GC/MS (CI mode) method provides data in a rapid and reliable way by avoiding any temperature influences, thus, eliminating artifact formation during the work-up procedure and the measurement. Application of the method on several foods (including baby foods) revealed considerable amounts of furan, especially in coffees (more than 2000 µg/kg). For the first time, the carry-over of furan from the drip grind into the brew was quantitatively monitored. The model studies confirmed the generation of high furan amounts from various precursors depending on the heating time and temperature applied. |
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Detection of Process-Induced Contaminants and Biohazards in Foods
1:30 PM-4:50 PM, Sunday, 10 September 2006 Moscone Center -- Room 124, Oral
Division of Analytical Chemistry |