Patent ID: 7829339
Filing Date: 2010-11-09
Classification: G01N

Abstract:
1. A mid IR spectrometric analysis instrument for determination of the content of casein in milk using a method where a milk sample is measured by infrared spectrometry to provide infrared absorbance data before and after a separation of the sample into a casein and liquid phase, the instrument comprising a computer encoded with a software program configured to direct operation of the spectrometer and execute the following steps: a) performing a first measurement by infrared spectrometry to measure infrared absorbance in the milk sample before separation and recording absorbance data obtained by the first measurement b) performing a second measurement by infrared spectrometry to measure infrared absorbance in a supernatant and recording absorbance data obtained by the second measurement c) calculating a dilution factor indicating the dilution of the supernatant compared to the original milk sample wherein the dilution factor is applied in a calculation of casein concentration, and d) calculating the casein content by use of absorbance data recorded during the two infrared spectrometry measurements and the dilution factor.