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- W2039485193 abstract "A novel capillary zone electrophoresis method is described for the determination of taurine in plasma. The method is rapidly executed and is highly selective for taurine as separation is based on the difference in ionisation of this amino acid from that of other amino acids. Following addition of homotaurine as internal standard, plasma proteins were precipitated with acetonitrile and the supernatant was derivatised with fluorescamine in the presence of a borate buffer. Capillary electrophoresis (CE) separations were carried out in reverse polarity mode at 27.5 kV on a Beckman P/ACE MDQ CE instrument, equipped with a diode array detector (DAD) set at 266 nm. The sample tray was cooled to 5 degrees C and separations were carried out at 20 degrees C. The fused-silica capillary was 50.2 cm in length (40.2 cm to detector) with an internal diameter of 75 microm. A capillary conditioning solution was applied daily in order to suppress the residual electroosmotic flow (EOF). The method, which was validated using feline plasma as the blank matrix, was shown to be linear and reproducible over the concentration range 2.5-100 microg/mL. The coefficients of variation (CVs) of replicate analyses were less than 4.5% at 1 microg/mL taurine in feline plasma and less than 3% for 2.5 microg/mL in human plasma. Recovery was estimated at 99.2% with a CV of 4.85%. It has been demonstrated that quantitation in aqueous solution yields similar results to those obtained by interpolation on a plasma calibration curve provided that subtraction for the taurine peak in unspiked plasma is carried out and that a suitable internal standard is employed." @default.
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- W2039485193 date "2000-03-01" @default.
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- W2039485193 title "Determination of taurine in plasma by capillary zone electrophoresis following derivatisation with fluorescamine" @default.
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- W2039485193 doi "https://doi.org/10.1002/(sici)1522-2683(20000301)21:4<699::aid-elps699>3.0.co;2-z" @default.
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