Tubular Reabsorption of Sodium, Chloride and Fluids. 99% of the glomerular filtrate volume (primary urine, 120 ml/min), 99% of the filtrated sodium and 99% of the filtered Chloride are reabsorbed in the renal tubules of the nephron.otassium reabsorption of the kidney. 60–70% of the filtered potassium (K +) is reabsorbed in the proximal tubule. There are no specific K-transporter, reabsorption is managed with the absorption of water (solvent drag).