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  • Title: Development and validation of a method for measuring the glycine and taurine conjugates of bile acids in bile by high-performance liquid chromatography.
    Author: Tietz PS, Thistle JL, Miller LJ, LaRusso NF.
    Journal: J Chromatogr; 1984 Dec 12; 336(2):249-57. PubMed ID: 6530458.
    Abstract:
    We developed and validated a simple method for measuring the individual glycine and taurine conjugates of bile acids in bile by high-performance liquid chromatography with a C18 reversed-phase column using an isocratic solvent system of acidified methanol--potassium phosphate. Without preliminary derivatization or purification, complete separation of the ten major conjugated bile acids present in bile could be achieved in 65 min. Total bile acid concentrations were identical when measured enzymatically and by summing the individual bile acids determined by high-performance liquid chromatography. Bile acid composition determined by gas-liquid chromatography correlated with results by high-performance liquid chromatography. Finally, measurements of individual glycine and taurine conjugates in human bile and in mixtures of bile acid standards by high-performance liquid chromatography and thin-layer chromatography gave similar results. This high-performance liquid chromatographic system permits simultaneous quantification of total and individual bile acids and their glycine and taurine conjugates in bile.
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