Week 15 FTIR Theory Flashcards
Electromagnetic radiation is…
Electromagnetic radiation is a form of energy that is transmitted in the form of electromagnetic waves, such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
what is ftir
FTIR (Fourier Transform Infra-Red Spectroscopy) is a surface-sensitive analytical technique used in conservation to study heritage materials, their degradation, and the performance of conservation materials. It uses a beam of infrared radiation to measure the reflection, absorption, and transmission of various materials and can provide information about their chemical composition and structure.
what is the wavenumber in ftir
The wavenumber in Fourier Transform Infra-Red (FTIR) spectroscopy is the number of wave cycles per centimeter of the infrared radiation. The wavenumber is typically measured in reciprocal centimeters (cm-1), and ranges from approximately 10 cm-1 (1000 nm) to approximately 700 cm-1 (1428 nm).
The y-axis on an FTIR graph
The y-axis on an FTIR graph represents the absorbance or transmittance of the sample, depending on the type of analysis.
Effect of IR radiation on molecules
Mid IR Absorption Regions: what do they represent
fingerprint reason: hard to interpret, lots of peaks indication single bonds
example: Ethyl Ethanoate-IR Spectrum
Correlation Table of IR Absorption Bands for common bond types
Infrared Spectrometer Types
Differences between FTIR and dispersive spectrometers
what is Fourier Transform
what are different sampling methods
How does FTIR sampling with an ATR crystal work
