Fourier transform near-infrared Raman chromatography

Because the IV is a measure of the relative unsaturation of a compound or sample, other analytical techniques (e.g., gas chromatography of FA composition, AOCS Cd lc-85) can be used to estimate the value. Interest in recent years has focused on spectroscopic techniques for the rapid determination of TV. Fourier transform (FT)-near-infrared, near-infrared, FT-Raman, and H and nuclear magnetic resonance (NMR) spectroscopic techniques have all been investigated (Ng and Gee, 2001). The most promising results have been obtained with FT-near-infrared spectroscopy, which only takes a few minutes to determine the iodine value (Cox et al., 2000). 

There is extensive work on measuring, controlling, and engineering more robust polymerization reactors, elaborated in Chapter 16. Richards and Congalidis have also provided a concise summary [50]. Much attention has been devoted to maintaining pressure, temperature, level, and flow (PTLF) in the reactor [51, 52]. Different online composition measurement techniques, such as IR analysis, Fourier transform infrared (FTIR), near IR (NIR), Raman spectroscopy [53], calorimetry [54], and gas chromatography (GS) are available, as discussed in Chapters 6,9,10,18, and 20. 

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