Transcription of Introductionto FourierTransform InfraredSpectrometry ...
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Introductionto FourierTransform InfraredSpectrometry ...
Introduction to Fourier TransformInfrared Spectrometry2 INTRODUCTIONWhat is FT-IR?FT-IR stands for Fourier Transform InfraRed, the preferred method of infrared spectroscopy. Ininfrared spectroscopy, IR radiation is passed through a sample. Some of the infrared radiation isabsorbed by the sample andsome of it is passed through(transmitted). The resultingspectrum represents the molecularabsorption and transmission,creating a molecular fingerprintof the sample. Like a fingerprintno two unique molecular structures produce the sameinfrared spectrum. This makesinfrared spectroscopy useful forseveral types of , what information can FT-IR provide? It can identify unknown materials It can determine the quality or consistency of a sample It can determine the amount of components in a mixtureThis booklet is an introduction to the concepts behind FT-IR spectroscopy.
Sensitivity: Sensitivity is dramatically improved with FT-IR for many reasons. The detectors employed are much more sensitive, the optical throughput is much higher (referred to as the. Jacquinot Advantage) which results in much lower noise levels, and the fast scans enable the
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