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- W4300152536 abstract "abstract The method described detects and confirms presence of pentobarbital residues in dry, extruded feeds at concentrations of 5-20 ppb. Dried feed is ground to a uniform powder and shaken overnight in methanol. A portion of the methanolic extract is evaporated, and the residue is reconstituted in phosphate-buffered saline. The aqueous extract is cleaned with a solid-phase extraction cartridge designed to extract barbiturate residues from biological matrixes. Dimethyl sulfoxide, tetramethylammonium hydroxide, and iodomethane are added to derivatize pentobarbital. 1,3-Dimethylpentobarbital is then acidified with dilute hydrochloric acid and extracted with isooctane. The organic layer is transferred and evaporated under a stream of nitrogen. The residue is reconstituted in a small volume of ethyl acetate for analysis by gas chromatography/mass spectrometry. The limit of detection is approximately 0.7 ppb. The method was validated with pentobarbital-fortified feed samples containing high concentrations of meat and bone meal." @default.
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- W4300152536 date "1998-03-01" @default.
- W4300152536 modified "2023-10-18" @default.
- W4300152536 title "Procedure for Detecting and Confirming Pentobarbital Residues in Dog Food by Gas Chromatography/Mass Spectrometry" @default.
- W4300152536 doi "https://doi.org/10.1093/jaoac/81.2.359" @default.
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