Search results with tag "Spectrum infrared"
INTERPRETATION OF INFRARED SPECTRA, A PRACTICAL …
www3.uma.ptThe vibrational spectrum of a molecule is considered to be a unique physical property and is characteristic of the molecule. As such, the infrared spectrum can be used as a fingerprint for identification by the comparison of the spectrum from an ‘‘unknown’’ with previously recorded reference spectra. This is the basis of computer-based
Water absorption spectrum - acamedia
www.acamedia.infoin the near-infrared spectrum (λ 970 nm). Recent work, using attenuated total reflectance (ATR) infrared spectroscopy, shows isobestic points for both ordinary and heavy liquid water, with respect to temperature. For H2O these are at around 600, 1600, 1680, & 3550 cm-1 [1738], in agreement with earlier work [530 ,699].g Shown
The Fundamentals of Infrared Spectroscopy
www.midac.comThe infrared spectrum is measured by either absorbance or percent transmittance on the y-axis and by either the wavelength (um) or wavenumber (cm-1) to measure the position of an infrared absorptionon the x -axis. Most compounds have characteristic …
PRINCIPLES OF REMOTE SENSING
www.wamis.orgvisible spectrum are designated as the infrared spectrum. British Astronomer William Herschel discovered this in 1800. The infrared region can be divided into two categories based on their radiation properties. Reflected IR (.7 µm - 3.0 µm) is used for remote sensing. Thermal IR (3 µm - 35 µm) is the radiation
Introductionto FourierTransform InfraredSpectrometry ...
www.chem.uci.eduAn infrared spectrum represents a fingerprint of a sample with absorption peaks which correspond to the frequencies of vibrations between the bonds of the atoms making up the material. Because each different material is a unique combination of …