Infrared spectroscopy , Fourier

Infrared spectroscopy (Fourier transform infrared (FTIR)... 

As with infrared spectroscopy, Fourier transform techniques are used to provide instantaneous data or to accumulate scans for increased sensitivity on microsamples. Spectra have been obtained on as little as 10 yg with Fourier transform NMR. However, it is not sensitive to minor components in a mixture. 

Fourier transform infrared spectroscopy Fourier transform mass spectrometry Fourier transform nuclear magnetic resonance fusion (melting) flash vacuum pyrolysis full width at half maximum... 

Infrared Spectroscopy. Fourier transform Infrared spectroscopy (Perkln-Elmer 1750) was used to measure surface characteristics of samples of various percent conversion. An attenuated total reflectance accessory with KRS-5 crystal (45°) provided sufficient absorp-... 

Infrared spectroscopy Fourier transform infrared (FTIR) and diffuse reflectance infrared Fourier transform spectroscopy have been reported for analyzing organic components of inks, such as resins. 

In mid-infrared spectroscopy, Fourier transform instruments are used almost exclusively. However, in Raman spectroscopy both conventional dispersive and Fourier transform techniques have their applications, the choice being governed by several factors [133], [134]. Consequently, a modern Raman laboratory is equipped with both Fourier transform and CCD-based dispersive instruments. For a routine fingerprint analysis, the FT system is generally used, because it requires less operator skill and is quicker to set up the FT system is also be tried first if samples are highly fluorescent or light sensitive. However, if the utmost sensitivity is required, or if Raman lines with a shift smaller than 100 cm" are to be recorded, conventional spectrometers are usually preferred. 

However, when monitoring and controlling polymerization reactors, one would like to get not only global reaction kinetics, but also information related to the state variables of the reactor namely, the concentration of monomer(s), polymer (conversion), concentration of radicals, molar masses, and so on. Obviously, this information cannot be directly obtained from the heat of reaction, bnt for some cases, the use of simple polymerization models in combination with the heat of reaction allows the state variables to be monitored noninvasively in real time and at mnch lower cost than when using dedicated instruments (near-infrared spectroscopy, mid-range infrared spectroscopy, Fourier transformed infrared spectroscopy, and/or Raman spectrometers). 

Fourier Transform Infrared Spectroscopy Fourier transform infrared spectroscopy (FTIR) coupled with an in situ probe is a powerful technique for instantaneously monitoring chanical species including monomers in a water-soluble polymerization matrix. Monomer concentrations can be determined from a partial least square (PLS) calibration curve estabhshed from a sales of reference samples with known monomer concentration generated by HPLC analysis. The determination of residual monomer is limited only by the sensitivity of the detector. Calihration curves are product and formula specific. 

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