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A specific and sensitive analytical method for the quantitative determination of cyanuric acid in animal feed was developed. Sample preparation involved the diethylamine/acetonitrile/water extraction of feed using sonication and shaking. The extract was subjected to clean-up by dual solid phase extraction using mixed mode anionic and cationic extraction cartridges. After removal of clean-up solvent,...
A sensitive liquid chromatographic–electrospray ionization–mass spectrometric (LC–MS) method has been developed for direct measurement of the concentration of tiopronin in human plasma. Hydrochloric acid solution was used to stabilize the tiopronin and prevent formation of a dimer, or reaction with endogenous thiols. The method involved liquid–liquid extraction of tiopronin from plasma samples with...
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