Wave shape chemical analysis apparatus and method
US4679426A · kind A · utility
Inventors
Key dates
| Filing date | Sep 9, 1985 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Sep 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N22/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for measuring the concentration of a chemical substance in a test sample based on a technique of waveform distortion analysis is disclosed. The apparatus includes a waveform generator that generates a periodic signal, an antenna probe that transmits the signal into the test sample and receives from the test sample a corresponding periodic signal, the waveform of which has been distorted or otherwise transformed by the chemical, and a detector circuit that quantifies the transformation of the signal to determine the concentration of the chemical in the test sample. The waveform shape and frequency are selected so that the transformation is particularly responsive to the presence of a selected chemical substance, so that the magnitude of the distortion or transformation of the signal is directly related to the concentration of the selected chemical substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.