The pH measurement with glass electrode in an electromagnetic field

Abstract

Measurements of pH values of buffer solutions (pH 4.0, 7.0 and 10.0) and distilled water were performed with a glass electrode in an electromagnetic field in the frequency interval of 10–200 MHz and an output power of dis­persed and reflected electromagnetic radiation of 0.01–3 W. In all the cases, a reduction of pH values occurred, i.e., a "recorded pH value" was obtained. The reduction appeared within the applied frequency interval, reaching extreme values at specific frequencies. The reduction of the pH values increased with the radiation power and depended of the solution buffer capacity. The effect of electromagnetic field on pH value change was exerted dominantly through the influence on glass electrodes.