Method of measuring the pH value of a test solution with glass-electrode measuring cells and of simultaneously calibrating the measuring cells
US5502388A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1994 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Feb 2, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4165
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the method of measuring the pH value of a test solution with glass-electrode measuring cells and of simultaneously calibrating the measuring cells, the potentials occurring at the pH glass electrode and the reference electrode are processed in a pH meter with temperature compensation and measuring-cell slope derivation. The potentials from a reference electrode (4) and two pH glass electrodes (2, 3) having different internal reference solutions (6, 7) are processed in a first (8) and a second pH meter (9). The measuring-cell slope is derived from the processed potential and, together with the slope, the measured value is derived simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.