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  • Title: Screening of UV-absorbing solutes in uremic serum by reversed phase HPLC--change of blood levels in different therapies.
    Author: Schoots AC, Homan HR, Gladdines MM, Cramers CA, de Smet R, Ringoir SM.
    Journal: Clin Chim Acta; 1985 Feb 28; 146(1):37-51. PubMed ID: 3987038.
    Abstract:
    In order to screen UV-absorbing solutes in large numbers of uremic serum samples, an automated liquid chromatographic method was developed. The method proved to be reliable and reproducible in more than 500 analyses. HPLC separation was performed using gradient elution on a 25-cm Ultrasphere Octyl reversed phase column, with 5 microns particles. Characteristic profiles for the uremic state were obtained in the analyses of serum samples of 43 uremic patients before and just after artificial kidney treatment; hemodialysis (n = 14), hemodiafiltration (n = 13) and hemofiltration (n = 16). In these profiles 20-40 peaks were resolved of which nine were 'quantitated' by peak height relative to a standard. Of these solutes creatinine, uracil, uric acid, hypoxanthine, indoxylsulfate, tryptophan and hippuric acid were identified. The heterogeneity of the population of uremic patients, with respect to the UV-absorbing solutes, was estimated. Significant differences of solute blood level changes during hemodialysis, hemodiafiltration and hemofiltration, were observed.
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