Instrumentation for PA-FTIR Analyses

A wide variety of FTIR instruments have been used to obtain PA-FTIR spectra. A cursory examination of the literature reveals some of the instruments used JEOL JIR-5500 IBM IR-95, IR-98,9195 Bruker IFS 66, IFS 88, IFS 113V Perkin Elmer 1750,1760-X, 1800 Bomen DA 3.02 Nicolet 20 SX, 20 DXB, SX-170, 7199, 740, 800 Mattson Cygnus 100, Sirius 100, Polaris Digilab FTS-10, FTS-10M, FTS-11, FTS-15, FTS-20, FTS-20E, FTS-60, FTS-65, FTS-6000 Laser Precision Analytical (Analect) RFX-75 and Analect FX-260. The Laser Precision Analytical Instrument required extensive modification. The list is only intended to indicate the wide variety of different instruments which have been used and may not be complete. The normal adjustments for maximum performance should be made, beam splitter alignment, etc. The source aperture, if any, should be opened fully for maximum source intensity. The gain control and other adjustments for best operation at each of the different mirror velocities to be used should be made. The 

Upper spectrum reproduced with permission from Bio-Rad Laboratories, Sadtler Division 

These spectra were converted from. ras to. abs files with no change in the Y-axis scale and then used to search Sadtler libraries of commercial material using Mattson First software with a correlation coefficient search algorithm which takes into account baseline drift and differences in scaling. As can be seen the sample spectrum and the library spectrum are usually quite similar. The library spectra shown here were the best hits in each of the searches with a search correlation coefficient of 0.9 with 1.0 representing a perfect match. 

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