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  • Title: Simultaneous determination of pseudouridine and creatinine in untreated urine by ion-pair liquid chromatography with diode-array ultraviolet detection.
    Author: Palmisano F, Rotunno T, Guerrieri A, Zambonin PG.
    Journal: J Chromatogr; 1989 Aug 25; 493(1):35-43. PubMed ID: 2778020.
    Abstract:
    A simple procedure for the simultaneous determination of pseudouridine and creatinine in urine using ion-pair high-performance liquid chromatography with ultraviolet detection is described. It consists of simply diluting the filtered urine with mobile phase (1:20) followed by direct chromatographic injection. A single analysis takes only 10 min. This method has been applied to the analysis of urine samples from normal donors and patients with different types of cancer. The mean values, means, of the peak-area ratio of pseudouridine to creatinine were 61.79.10(-3) and 81.92.10(-3) for male and female normal donors, respectively. Out of twenty-five urine samples of patients with cancer examined, nineteen (all the forteen males included) had values higher than means + 2 sigma.
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