Near Infrared Analysis

Near-infrared analysis (NIRA) is an analytical technique which uses the diffuse reflectance of a sample to determine spectrophotometrically the chemical concentrations or physical properties of a sample. Because NIRA uses a series of multiple linear regressions to deduce automatically corrections for background or sample-matrix interferences. it can analyze many sample types that would be difficult by another spectroscopic technique. An automatic correction of interferences allows NIRA to operate independently of fully understood chemistry or spectroscopy. The present work lists and defines the practical considerations involved in developing and utilizing NIRA as well as presenting a cross-section of current applications. Among the considerations addressed are selecting the analyte. choosing “training” samples, and creating a calibration Throughout each discussion, the advantages of NIRA are detailed.