Glutamate concentration in plasma, erythrocyte and muscle in relation to plasma levels of insulin-like growth factor (IGF)-I, IGF binding protein-1 and insulin in patients on haemodialysis |
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Authors: | JC Divino Filho SJ Hazel P Fürst J Bergstr?m K Hall |
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Affiliation: | Centre National d'Etudes Vétérinaires et Alimentaires, Laboratoire des Médicaments Vétérinaires, Fougères, France. |
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Abstract: | A simple, sensitive, and rapid method for simultaneous determination of residues of flumequine and its microbiologically active metabolite 7-hydroxyflumequine in 100 mg sheep edible tissues (muscle, liver, kidney, and fat) by liquid chromatography is reported. After liquid-liquid cleanup with ethyl acetate, tissue extracts were injected onto a Select B column. The 2 compounds were determined by ultraviolet and fluorimetric detection. The method was repeatable and reproducible for flumequine and 7-hydroxyflumequine in muscle, liver, kidney, and fat, with limits of detection below 2 and 3 micrograms/kg for flumequine and 7-hydroxyflumequine, respectively. Mean recoveries for flumequine were 90 +/- 7, 82 +/- 7, 89 +/- 5, and 82 +/- 6% in muscle, liver, kidney, and fat respectively. Mean recoveries for 7-hydroxyflumequine were 91 +/- 2, 90 +/- 4, 86 +/- 3, and 84 +/- 4% in muscle, liver, kidney, and fat, respectively. |
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