Pork pH Determined by ISFET Electrode Shows Higher Value than Glass Electrode

Equilibrium Potentials of Membrane Electrodes ( glass electrode / pH ) JUI

A simple thermodynamic theory of the equilibrium potentials of membrane electrodes is formulated and applied to the glass electrode for measurement of pH. The new formulation assumes the selective adsorption or binding of specific ions on the surface of the membrane which may or may not be permeable to the ion, and includes the conventional derivation based on reversible ion transport across me...

pH Measurement with the Glass Electrode and Vacuum Tube Potentiometer.

Development of the Glass Electrode and the pH Response

The glass electrode is the most commonly used device to access the pH of an aqueous solution. It attains highly accurate measurements via simple and well-established procedures. However, the reasons why the glass electrode potential scales with hydrogen ion concentration according to almost Nernstian potential values have been long-standing challenges to explain. Only in the past 50 years has a...

The ion sensitive field effect transistor (ISFET) pH electrode: a new sensor for long term ambulatory pH monitoring.

Intraluminal pH monitoring in man should be performed with disposable multichannel assemblies that allow recordings at multiple sites and prevent transmission of infection. Currently available glass electrodes are unsuitable for this purpose because of their size and price. We have thus constructed and tested a small, combined ion sensitive field effect transistor (ISFET) pH electrode incorpora...

Analysis of Acid Papers by Non-Aqueous Solvent Extraction- Spectrophotometry and Upside-down pH Glass Electrode

Non-aqueous solvent extraction of acid in papers is described; the process employs a liquid ion-exchanger in chloroform. The amounts of the acid in the so-called acid paper are determined by the normal method of aqueous extraction and by the organic solvent extraction and the values are compared. The results of investigation confirm that the acid content of the acid paper must be determined by ...