TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

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The detectors that are used in ultraviolet-visible spectrophotometry measure photons. If these photon detectors are replaced by a detector that measures pressure waves, the technique is known as photoacoustic, or optoacoustic, spectrometry. Photoacoustic spectrometers typically employ microphones or piezoelectric transducers as detectors.  3, fiche 1, Anglais, - photoacoustic%20spectrometry

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… photoacoustic spectrometry uses the thermal expansion of light-absorbing particles caused by the transfer of radiative energy into thermal energy.  4, fiche 1, Anglais, - photoacoustic%20spectrometry

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

La spectrométrie optoacoustique est […] une mesure indirecte d’une absorption induite par laser; on mesure une variation de pression (l’échauffement rapide et localisé provoque une dilatation) proportionnelle à la concentration, au moyen d’une cellule piézoélectrique.  1, fiche 1, Français, - %20spectrom%C3%A9trie%20optoacoustique

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Fiche 2,  Justifications,  Anglais

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Variable-Wavelength Detector. Usually a wide-bandpass ultraviolet-visible spectrophotometer is coupled to the chromatographic system. Its advantage is the wide selection of wavelengths from 190 to 600 nm, which permits the user to choose the wavelength at which solute absorbance is maximum. Disadvantages are increased cost and increased detector noise level that is usually a factor of five to ten greater than that of filter photometers.  1, fiche 2, Anglais, - variable%2Dwavelength%20detector

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Fiche 2,  Justifications,  Espagnol