Simultaneous determination of three residual barbiturates in pork using accelerated solvent extraction and gas chromatography–mass spectrometry
A new method was developed for the rapid extraction and unequivocal determination of barbital, amobarbital and phenobarbital residues in pork. The isolation of the analytes from pork samples was accomplished by utilizing an accelerated solvent extractor ASE 300. The procedure was automatically carri...
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Published in | Journal of chromatography. B, Analytical technologies in the biomedical and life sciences Vol. 840; no. 2; pp. 139 - 145 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
18.08.2006
Elsevier Science |
Subjects | |
Online Access | Get full text |
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Summary: | A new method was developed for the rapid extraction and unequivocal determination of barbital, amobarbital and phenobarbital residues in pork. The isolation of the analytes from pork samples was accomplished by utilizing an accelerated solvent extractor ASE 300. The procedure was automatically carried out in series for fat removing and extraction, respectively with
n-hexane and acetonitrile pressurized constantly at 10.3
MPa for 30
min. After evaporation, the extracts were cleaned up on a C
18 solid phase extraction (SPE) cartridge and the barbiturates were eluted with hexane–ethyl acetate (7:3), evaporated on a rotary evaporator and derivatized with CH
3I. The methylated barbiturates were separated on a HP-5MS capillary column and detected with a mass detector. Electron impact ion source (EI) operating in time program-selected ion monitoring mode (SIM) was used for identification and external standard method was used for quantification. Good linearity was obtained in the range from 0.5
μg/kg to 25
μg/kg. Average recoveries of the three barbiturates spiked in pork ranged from 84.0% to 103.0%, with relative standard deviations from 1.6% to 12%. The limit of detection (LOD) was 0.5
μg/kg for the three barbiturates (S/N
≥
3). The quantification limit (LOQ) was 1
μg/kg for the three barbiturates (S/N
≥
10). |
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ISSN: | 1570-0232 1873-376X |
DOI: | 10.1016/j.jchromb.2006.05.002 |