Multiresidue recovery at PPB levels of 10 nitrosamines from frankfurters by supercritical fluid extraction.
The design of a laboratory-assembled supercritical fluid extractor is described for the efficient recovery of volatile nitrosamines from a common-cured meat product, frankfurters. The principal feature of the apparatus was a newly designed restrictor-collector interface where a commercial solid-phase extraction cartridge was directly attached to the micrometering valve. This reduced the path length between the discharge tube and the 1 g silica gel sorbent bed. The elapsed time for each 2.5 g sample extraction with supercritical CO2 was 17 min. The nitrosamines were separated and detected using a gas-chromatographic chemiluminescence (Thermal Energy Analyzer, Thermedics, Inc.; Woburn, MA) system. Recovery of 10 volatile aliphatic and alicyclic nitrosamines from frankfurters, fortified at the 20 ppb level, ranged from 84.3 to 104.8% with relative standard deviation of 2.34 to 6.13%.
U.S. Department of Agriculture, ARS, Eastern Regional Research Center, Philadelphia, Pennsylvania 19118.
R J
RJ
Maxwell
J W
JW
Pensabene
W
W
Fiddler
D002245:Carbon Dioxide; D002849:Chromatography, Gas; D004350:Drug Residues / Q000302:isolation & purification*; D006358:Hot Temperature; D008163:Luminescent Measurements; D008461:Meat Products / Q000032:analysis*; D009602:Nitrosamines / Q000302:isolation & purification*; D011312:Pressure; D058428:Silica Gel; D012822:Silicon Dioxide; D012996:Solutions; D014835:Volatilization
D009602:Nitrosamines; D012996:Solutions; D002245:Carbon Dioxide; D058428:Silica Gel; D012822:Silicon Dioxide