Transcription of Principles of FTIR Spectroscopy - Michigan State University
1 Principles of FTIR Spectroscopy InFTIR analyses, ,movingmirror, ,beforebeingrecombinedbythebeamsplitter. Asthemovingmirrormakesreciprocatingmovem ents,theopticalpathdifferencetothefixedm irrorchanges, Theintensityoftheinterferencelightisreco rdedinaninterferogram,withtheopticalpath differencerecordedalongthehorizontalaxis . =2 interferogramfrequency = 2 mirror velocity =1 Principles of Diffuse Reflectance MethodKistheabsorptioncoefficient, ,thecomparativereflectancer withrespecttoastandardpowdersuchasKBrorK Cl,ofwhichKisnearzero(0)intheactualmeasu rementrangeSpectrum of solid caffeineMeasurement of chemicals adhering to a surface -PowdersShimadzu websiteHigh Sensitivity Reflection MeasurementAreflectionmethodisrequiredto measuresubstancesadheredtoorappliedtoama terialthatdoesnotpermitlighttransmission , FilmPath , , websiteHigh Sensitivity Reflection MeasurementAreflectionmethodisrequiredto measuresubstancesadheredtoorappliedtoama terialthatdoesnotpermitlighttransmission , of a 25 -thick organic film on a Au stretching modesShimadzu websiteAttenuated Total depth = mDiamond, Si, Ge(high refractive index)
2 Shimadzu websiteFluorescence and FTIR MicroscopyDetectorUsefulforgeneratingspa tialmapsof vibrationalmodes .Forexample,tissueanalysis,polymerhomoge neity,pharmaceuticalquality.
