Method and apparatus for measuring PH of solution
US9304088B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 19, 2012 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Nov 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/1211
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring a pH of a solution includes: emitting light beams of two wavelengths from one side of a measuring region of a solution into which an indicator is mixed, while pulsating the solution in the measuring region; receiving at least one of transmitted light beams and reflected light beams of the emitted light beams on the other side of the measuring region, while pulsating the solution in the measuring region; obtaining absorbances of the two wavelengths based on the received at least one of the transmitted light beams and the reflected light beams; obtaining an absorbance ratio from the obtained absorbances; and calculating a pH value of the solution based on the obtained absorbance ratio and an absorbance ratio/pH value correspondence database which is previously stored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.