INTERPRETATION OF CHEMICAL STRUCTURAL-CHANGES BY TARGET-PROJECTION ANALYSIS OF INFRARED PROFILES

Infrared profiles are used as structural descriptors for a range of ch emical systems, embracing samples from process analysis, geochemistry and physical chemistry. Structural mapping by infrared profiling accom panied by target-projection analysis is shown to be a powerful tool fo r interpretation of the variation pattern in chemical systems. In most of the applications the interpretation complies with the understandin g of the chemical changes taking place in the system discussed. For so me applications, the target-projection analysis brings new insight by highlighting the changes in the multivariate infrared descriptors.