Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1175, Issue 2, Pages 227-233Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2007.10.051
Keywords
closantel residues; oasis MAX SPE cartridges; LC-ESI-MS/MS; bovine tissues; milk
Ask authors/readers for more resources
A liquid chromatographic-electrospray ionisation-tandem mass spectrometry method (LC-ESI-MS/MS) with solid extraction was developed and validated for the detection and determination of closantel residues in bovine tissues and milk. An acetonitrile-acetone mixture (80:20, v/v) was used for one-stage extraction of closantel residues in bovine tissues and milk samples, and the extract was cleaned by solid phase extraction with Oasis MAX cartridges. The mass spectrometer was operated in multiple reactions monitoring mode with negative electrospray interface. The limits of detection in different matrices were in the range of 0.008-0.009 mu g/kg. The overall recoveries for bovine muscle, liver, kidney and milk samples spiked at four levels including MRL were in the range of 76.0-94.3%. The overall relative standard deviations were in the range of 3.57-8.61 %. The linearity is satisfactory with a correlation coefficient (r(2)) of 0.9913-0.9987 at both concentration ranges of 0.02-100 mu g/kg and 200-5000 mu g/kg. The method is capable of identifying closantel residues at >= 0.02 mu g/kg levels and was applied in the determination of closantel residues in animal origin foods. (c) 2007 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available