Method for standardizing raman spectrometers to obtain stable and transferable calibrations
US5850623A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Oct 9, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/278
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for providing a standard Raman spectrum from a sample uses a particular Raman spectrometry apparatus or any similar Raman spectrometry apparatus, which is used to simultaneously irradiate a reference material and at least one sample, thereby obtaining their respective convolved Raman spectra. Using a defined standard energy dispersion characteristic and a standard Raman spectrum of the reference material, a convolution function is determined and applied to produce a deconvolved Raman spectrum of the sample. This deconvolved spectrum is multiplied by a defined standard photometric response function to produce a standard Raman spectrum of the sample. A method for providing an accurate and precise quantitative analysis of the chemical composition and/or physical properties of an unknown sample uses the standard Raman spectra of a plurality of known samples to construct a normalized calibration, which is applied to a standard Raman spectrum of the unknown sample to produce an accurate and precise quantitative analysis thereof, using any similar Raman spectrometry apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.