06 IR ATR_page_13

06 IR ATR | page 13 | https://thedailydialectics.com/pdfs/education/chemistry/analytical-chem/analytical-methods-for-analysis-UH/06 IR ATR/06 IR ATR.pdf

Chem4229-Instrumental Methods of Analysis protrudes a few microns (0.5 1 - 5 ) beyond the crystal surface and into the sample. In regions of the infrared spectrum where the sample absorbs energy, the eva- nescent wave will be attenuated or altered. The atten- uated energy from each evanescent wave…