Natrium (Na)

Engelsk navn:Sodium
Reagensprodusent:Siemens Medical Solutions Diagnostics
Analyseprinsipp:Ion Selective Electrode (ISE), diluted
This method is based on an indirect potentiometric procedure using an ion selective electrode. The sodium ion selective electrode responds selectively to sodium ions according to the Nernst equation.
The sample is mixed with ISE buffer, thereby providing a constant pH and a constant ionic strength solution. As the buffered sample is moved through the ion selective electrode, changes in the electrical potential take place. These electrical potential changes are measured against the potential of a reference electrode in order to derive the correct analogue value for that sample.
(Metoden tatt i bruk: 1/7-01)
Referanse:1.Eisenman G: Glass Electrodes for Hydrogen and Other Cations, Principles and Practise. New York, Marcel Dekker Inc., p 2 (1967)
2.Tietz, NW: Clinical Guide to Laboratory Tests, 3rd Edition
WB Saunders Company, Philadelphia, PA pp 610-611 (1995)