Practical Example of the Addition Method Sodium and Potassium Determination in Blood Serum

6 Practical Example of the Addition Method Sodium and Potassium Determination in Blood Serum 

1 Sodium-Selective Glass Membrane Electrode 1 Potassium-Selective Ion-Carrier Electrode 

1 Ag/AgCl Reference Electrode with Sleeve Diaphragm and Double Salt Bridge 1 Thermostated Sample Cell 

In normal blood serum one can expect a sodium content of about 140 meq/1 and a potassium content of about 5 meq/1. Due to the large excess of sodium ions and the small selectivity coef- 

Since we do not know the state of Na or K in blood serum, we choose an addition procedure. 

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