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Related to Spectrophotometre: spectrometer, transmittance, absorbance


(analytical chemistry)
A method of chemical analysis based on the absorption or attenuation by matter of electromagnetic radiation of a specified wavelength or frequency. The radiation interacts with specific features of the molecular species being determined, such as the vibrational or rotational motions of the chemical bonds. The radiation can also interact with specific atoms or the whole molecule, for example, by causing the molecule to change its electronic energy state.



a branch of measurement technology that draws on spectrometry, photometry, and metrology in developing methods and instruments for the quantitative measurement of spectral absorptance, reflectance, emissivity, and luminance as quantities characterizing media, coatings, surfaces, and radiators.

References in periodicals archive ?
Leur quantification est faite par spectroscopie d'absorption atomique en utilisant le spectrophotometre de marque Perkin Elmer modele Analyst 400.
Le melange a ete incube a la temperature de la salle pendant 2 h et l'absorbance a ete mesuree a 760 nm avec un spectrophotometre [12].