Submitted to: Corn Dry Milling Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/13/1997
Publication Date: N/A
Technical Abstract: The utility of near-infrared spectroscopy (NIRS) for analyses of agricultural commodities is well documented. Absorption patterns observed in the near-infrared region, however, arise from overtones of primary, mid-infrared absorbances. Mid-infrared absorbances are very distinct and, unlike their near-infrared counterparts, can often be assigned to specific chemical moieties. While the fundamental information provided by mid-infrared absorption patterns is very powerful, obtaining a signal in this region from a solid material, such as corn, is a challenge. Several techniques recently have been developed which provide suitable mid-infrared spectra from solids, two of which (Photoacoustic Spectroscopy and Transient Infrared Spectroscopy) are further discussed.