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  2. Ultraviolet–visible spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet–visible...

    A UV-Vis spectrophotometer is an analytical instrument that measures the amount of ultraviolet (UV) and visible light that is absorbed by a sample. It is a widely used technique in chemistry, biochemistry, and other fields, to identify and quantify compounds in a variety of samples.

  3. UV detectors - Wikipedia

    en.wikipedia.org/wiki/UV_detectors

    The vast majority of liquid chromatographic systems are equipped with ultraviolet (UV) absorption detectors. The most common UV-Vis detectors used are variable wavelength detectors (VWD), photo diode array detectors (PDA), and diode array detectors (DAD). [4] Variable wavelength detectors decide in advance which wavelength is needed for the ...

  4. Spectrophotometry - Wikipedia

    en.wikipedia.org/wiki/Spectrophotometry

    Ultraviolet-visible (UV-vis) spectroscopy involves energy levels that excite electronic transitions. Absorption of UV-vis light excites molecules that are in ground-states to their excited-states. [5] Visible region 400–700 nm spectrophotometry is used extensively in colorimetry science. It is a known fact that it operates best at the range ...

  5. Variable pathlength cell - Wikipedia

    en.wikipedia.org/wiki/Variable_pathlength_cell

    In ultraviolet-visible spectroscopy or spectroscopy in general a 1 cm pathlength cuvette is used to measure samples. The cuvette is filled with sample, light is passed through the sample and intensity readings are taken. The slope spectroscopy technique can be applied using the same methods as in absorption spectroscopy.

  6. Optical spectrometer - Wikipedia

    en.wikipedia.org/wiki/Optical_spectrometer

    In modern spectrographs in the UV, visible, and near-IR spectral ranges, the spectrum is generally given in the form of photon number per unit wavelength (nm or μm), wavenumber (μm −1, cm −1), frequency (THz), or energy (eV), with the units indicated by the abscissa.

  7. DU spectrophotometer - Wikipedia

    en.wikipedia.org/wiki/DU_spectrophotometer

    [17]: 18 Its designation as a "UVVis" spectrophotometer indicates its ability to measure light in both the visible and ultraviolet spectra. [ 29 ] The DU was the first commercially viable scientific instrument for measuring the amount of ultraviolet light absorbed by a substance.

  8. Ultraviolet–visible spectroscopy of stereoisomers - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet–visible...

    Ultraviolet–visible spectroscopy (UVvis) can distinguish between enantiomers by showing a distinct Cotton effect for each isomer. UVvis spectroscopy sees only chromophores, so other molecules must be prepared for analysis by chemical addition of a chromophore such as anthracene.

  9. UV-visible spectroscopy - Wikipedia

    en.wikipedia.org/?title=UV-visible_spectroscopy&...

    UV-visible spectroscopy. Add languages. Add links. Article; ... Download as PDF; Printable version; In other projects ... Redirect page. Redirect to: Ultraviolet ...