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  2. Ultraviolet–visible spectroscopy - Wikipedia

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

    UV-Vis can be used to monitor structural changes in DNA. [8] UV-Vis spectroscopy is routinely used in analytical chemistry for the quantitative determination of diverse analytes or sample, such as transition metal ions, highly conjugated organic compounds, and biological macromolecules. Spectroscopic analysis is commonly carried out in ...

  3. Ultraviolet photoelectron spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet_photoelectron...

    With this source, Turner's group obtained an energy resolution of 0.02 eV. Turner referred to the method as "molecular photoelectron spectroscopy", now usually "ultraviolet photoelectron spectroscopy" or UPS. As compared to XPS, UPS is limited to energy levels of valence electrons, but measures them more accurately.

  4. Variable pathlength cell - Wikipedia

    en.wikipedia.org/wiki/Variable_pathlength_cell

    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. With the advent of accurate linear stages, variable pathlength absorption spectroscopy is easily applied experimentally.

  5. Spectrophotometry - Wikipedia

    en.wikipedia.org/wiki/Spectrophotometry

    This method requires a spectrophotometer capable of measuring in the UV region with quartz cuvettes. [3]: 135 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]

  6. Fluorescence spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Fluorescence_spectroscopy

    Fluorescence spectroscopy (also known as fluorimetry or spectrofluorometry) is a type of electromagnetic spectroscopy that analyzes fluorescence from a sample. It involves using a beam of light, usually ultraviolet light , that excites the electrons in molecules of certain compounds and causes them to emit light; typically, but not necessarily ...

  7. Deuterium arc lamp - Wikipedia

    en.wikipedia.org/wiki/Deuterium_arc_lamp

    This is similar to the situation in a hydrogen flame. Arc lamps made with ordinary light-hydrogen provide a very similar UV spectrum to deuterium, and have been used in UV spectroscopes. However, lamps using deuterium have a longer life span and an emissivity (intensity) at the far end of their UV range which is three to five times that of an ...

  8. Spectroelectrochemistry - Wikipedia

    en.wikipedia.org/wiki/Spectroelectrochemistry

    Infrared spectroscopy is based on the fact that molecules absorb electromagnetic radiation at characteristic frequencies related to their vibrational structure. Infrared (IR) spectroelectrochemistry is a technique that allows the characterization of molecules based on the resistance, stiffness and number of bonds present.

  9. Angle-resolved photoemission spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Angle-resolved...

    Angle-resolved photoemission spectroscopy (ARPES) is an experimental technique used in condensed matter physics to probe the allowed energies and momenta of the electrons in a material, usually a crystalline solid. It is based on the photoelectric effect, in which an incoming photon of sufficient energy ejects an electron from the surface of a ...

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