More on direct potentiometry--the ion-selective electrode vs flame photometry.

1980 ◽  
Vol 26 (13) ◽  
pp. 1921-1922 ◽  
Author(s):  
J D Czaban ◽  
A D Cormier
Keyword(s):  
Ion Selective Electrode ◽  
Flame Photometry ◽  
Selective Electrode ◽  
Direct Potentiometry

Determination of sodium with ion-selective electrodes.

1981 ◽  
Vol 27 (8) ◽  
pp. 1435-1438 ◽  
Author(s):  
G B Levy
Keyword(s):  
Whole Blood ◽  
Theoretical Basis ◽  
Protein A ◽  
Ion Selective Electrode ◽  
Flame Photometry ◽  
Ion Selective Electrodes ◽  
Selective Electrode ◽  
Indirect Methods ◽  
Direct Potentiometry

Abstract The advent of ion-selective electrodes made possible the potentiometry of sodium in serum and plasma. These methods were based on dilution of serum, as done in flame photometry, and the results were identical. Analysis of whole blood precludes dilution and so "direct" potentiometry was developed. Results by this technique are variable but tend to compensate for the spurious hyponatremias found by the "indirect" dilution methods due to displacement of volume by lipids and protein. However, there is no unambiguous theoretical basis on which to choose between the various direct ion-selective-electrode techniques and instruments. As an alternative, I propose use of current indirect methods, with numerical correction for the shift in normal sodium values in the presence of abnormal lipid and (or) protein. A table was constructed for making such corrections.

In Reply: More on Direct Potentiometry—the Ion-Selective Electrode vs Flame Photometry

1980 ◽  
Vol 26 (13) ◽  
pp. 1922-1923 ◽  
Author(s):  
Robert L Coleman ◽  
C C Young ◽  
L Sidoni
Keyword(s):  
Ion Selective Electrode ◽  
Flame Photometry ◽  
Selective Electrode ◽  
Direct Potentiometry

scholarly journals Direct Potentiometry of Polyacrylate with Solid-Membrane Cadmium Ion-Selective Electrode

2009 ◽  
Vol 58 (8) ◽  
pp. 749-752
Author(s):  
Takanori Ichikawa ◽  
Takashi Yasui ◽  
Kazutake Takada ◽  
Akio Yuchi
Keyword(s):  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Cadmium Ion ◽  
Direct Potentiometry
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