Method for casein determination in milk
US7829339B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2010 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Feb 15, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The content of casein in milk is determined by two measurements of infrared absorbance in a milk sample by infrared spectrometry before and after a separation of the casein. The casein content is calculated by use of absorbance data recorded during the two absorbance measurements. The new method is considerable faster than the known wet-chemical methods, such as the normal wet chemical reference method for casein determination in milk using a Kjeldahl nitrogen determination of the milk sample, then a coagulation of the milk, and finally a Kjeldahl nitrogen determination of the filtrate. Further the new method provides a more reliable accuracy than the know determination using a single infrared analysis of a milk sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.