Abstract
ABSTRACT We have used fiber optic remote process spectroscopy to monitor processes at Kodak in the lab, in development orpilot, and in production. This talk will examine the use of near infrared (NW) diffuse reflectance spectroscopy as aprocess technology. Diffuse reflectance spectroscopy offers the capability of looking at powders (even with 40%volatiles), slurries (as high as 40% solids), emulsions, and dispersions. Unlike attenuated total internal reflectance(Am) spectroscopy, diffuse reflectance offers the capability of interrogating both the liquid and solid phases of thematerial. This provides the ability to examine the physical state of the solid, such as particle size and morphology,even in a slurry, or in the presence of large amounts of solvent, in addition to the chemical quality of the solution.The use of the NW spectral region provides the advantages of high signal-to-noise ratio, impressive photometric stability, and commercially available instrumentation, probes, and optical fiber cable. Some representativeexamples will be presented to demonstrate the capabilities of diffuse reflectance spectroscopy for process
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