Chromatographic studies of uremic plasma

In order to characterize the spectrum of possibly toxic retention compounds in uremia we have developed a simple reproducible method of separating fractions of uremic serum by Sephadex G-15 column chromatography. This technique, which requires no prior deproteinisation and is carried out at ambient temperatures, allowed the separation of uremic serum into several well defined fractions. Subsequent thin layer chromatography (TLC) showed that each peak represented a mixture of peptides, and that there were qualitative and quantitative differences between the plasma of normal and uremic patients as well as between patients with acute renal failure and chronic renal failure.