Method and a spectrometer for quantitative determination of a constituent in a sample
US7288767B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 2003 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Mar 24, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/274
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method of determining a constituent of a sample and more specifically, to a method of correcting an absorbance value for a spectrometer. The method is especially applicable in connection with spectrometric analysis instruments for quantitatively determining the chemical composition of fluids, e.g. the content of fat, protein lactose or urea, in food products, especially in raw milk or dairy products. The method is based upon a measurement of one or more selected ranges of a spectrum, providing an absorption spectrum of the product. The method may be applicable in connection with all spectroscopic instruments giving rise to specific ranges of a spectrum, such as UV, VIS, NIR, IR, NMR, MS, etc.). Typically, the spectrum will be a MID-IR absorption spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.