Patent ID: 8026483

Claim:
A method for determining an unknown sugar concentration in an unknown sample, comprising: collecting unknown background spectral data of an unknown sample by passing light of various wavelengths through a first polarizer, a second polarizer oriented at a 45 degree angle with respect to the first polarizer, and the unknown sample, and recording the resultant light intensity with a spectrometer to give the unknown background spectral data; collecting unknown spectral data of the unknown sample by passing light of the various wavelengths through the first polarizer, the unknown sample, and the second polarizer oriented at a 45 degree angle with respect to the first polarizer, and recording the resultant light intensity with the spectrometer to give the unknown spectral data; adjusting the unknown spectral data by subtracting the unknown background spectral data to give adjusted unknown spectral data; and inserting the adjusted unknown spectral data into a regression model to allow calculation of the unknown sugar concentration in the unknown sample.