title: A simple HPLC method for quantitating major organic solutes of renal medulla.
abstract: A simple high performance liquid chromatography (HPLC) method of separating and quantitating the predominant organic solutes of the renal medulla is described. These organic solutes include myo-inositol, glycerophosphorylcholine, sorbitol, betaine, and urea. Other physiologically significant solutes, including glucose and mannitol, can be separated and quantitated concurrently with this method. With the use of this technique, the organic solutes of the rabbit kidney were determined. No new organic compounds were detected by HPLC that could significantly contribute to intracellular osmolality of the medulla. The values for the organic solutes already described were similar to those obtained by more complicated and limited approaches such as classical enzymatic techniques, ion electrodes, nuclear magnetic resonance spectroscopy, and gas chromatography-mass spectroscopy.
authors.affiliation: Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, Bethesda, Maryland 20892.
authors.forename: S D
authors.initials: SD
authors.lastname: Wolff
authors.forename: P H
authors.initials: PH
authors.lastname: Yancey
authors.forename: T S
authors.initials: TS
authors.lastname: Stanton
authors.forename: R S
authors.initials: RS
authors.lastname: Balaban
mesh_terms: D000818:Animals; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005069:Evaluation Studies as Topic; D007679:Kidney Medulla / Q000032:analysis*; D011817:Rabbits; D012015:Reference Standards