NIRS technique

NIRS (Near Infrared Reflectance Spectroscopy) is a modern analytical method for products based on the selective absorption properties of organic matter, in the Infrared region. Organic matter has selective properties of absorption, transmission or reflection in the N.I.R. spectrum. Those properties combined with light scattering, produce diffuse reflectance of light, holding major information about the chemical composition of samples.

The time required for one analysis is between a few seconds and a few minutes, thus several samples can be scanned, saving time and reducing costs compared to conventional techniques. This is due to the simplified procedures and large variety of analysis available. Also, samples are not destroyed during testing.

However, the right choice of an adequate algorithm to be used in data processing (i.e., PCR = Principal Component Regression or MPLS = Modified Partial Least Square) is crucial. This and the calibration of the instrument require sophisticated knowledge of N.I.R. theory. N.I.R. does not obtain accurate information about minerals or inorganic components.

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