On the Activities of Sodium and Potassium Ion in the Solution Containing Bovine Albumine

1. An activity of stodium ion was measured with the cation-selective glass electrode. In the NaCl solution containing bovine serum albumine by 7%, about 10 meq/l of the ion seemed to ne inactive. The ionic concentration of the solution was ranged between 0.01 and 0.3 molar. 2. A liquid junction potential of the 2 molar potassium citrate in the glass capillary with reference to the simple KCl solution was compared to that with the solution of the same ionic concentration containing albumine by 5 or 7%. The estimated activities of the potassium ion were nearly the same in both solutions, containing or discontaining albumine.