The Term Fourier Transform Infrared Spectroscopy (Ftir) Refers to a Fairly Recent Development In the Manner In Which the Data Is Collected and Converted from and Interference Pattern to a Spectrum. a Ftir Spectrometer Obtains Infrared Spectra By First Collecting an Interferogram of Sample Signal With an Interferometer, Which Measures All If Infrared Frequencies Simultaneously. Finding of the Study the Final Transmittance Absorbance Spectrum Should Be Devoid of All Instrumental and Environmental Contributions, and Only Present the Features of the Sample. If the Concentrations of Gases Such As Water Vapor and Carbon Dioxide In the Instrument Are the Same When the Background and Sample Spectra Are Obtained, Their Contributions to the Spectrum Will Ratio Out Exactly and Their Bands Will Not Occur.