Journal
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
Volume 767, Issue 1, Pages 93-101Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0378-4347(01)00549-7
Keywords
alachlor
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A method based on liquid chromatography (LC) in combination with mass spectrometry (MS) for the analysis of alachlor (ALA) and its metabolites, 2-chloro-N-[2,6-diethylphenyl]acetamide (CDEPA) and 2,6-diethylaniline (DEA), in rat plasma and urine has been developed. C-13-labeled ALA was used as the internal standard for quantitation. The analyte in plasma or urine was isolated using a Waters Oasis HLB extraction plate. The mass spectrometer was,operated in the ESI MS-SIM mode with a programming procedure. The retention times: for ALA, CDEPA and DEA were 1.84, 3.11 and 4.12 min, respectively. The limits of quantification (LOQ) for ALA, CDEPA and DEA were 2.3, 0.8 and 0.8 ng per injection, respectively. The linear fit of analyte to mass response had an R-2 of 0.99. Reproducibility of the sample handling and LC-MS analysis had a RSD of less than or equal to 10%. The average recoveries for these analytes in rat plasma were better than 90%. Similar results were obtained with rat urine. Published by Elsevier Science B.V.
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