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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.
It is the link between the electrochemistry and the UV-Vis absorption spectroscopy. [3] Devices to conduct the radiation beam: lenses, mirrors and/or optical fibers. The last ones conduct electromagnetic radiation over great distances with hardly any losses.
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 ...
Infrared spectrophotometers were better suited than UV–Vis spectrophotometers to the analysis of C 4 hydrocarbons, particularly for applications in petroleum refining and gasoline production. [2]: 159 [4]: 17
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 ...
The Cary 14 spectrophotometer was first produced in 1954 by the Applied Physics Corporation, which later was named the Cary Instruments Corporation after co-founder Howard Cary. [1] The instrument was a successor to the Cary 11, which was the first commercially available recording UV/Vis spectrophotometer. [3]
Mettler Toledo UV7 Spectrophotometer Mettler diversified its product line in 1970 with the introduction of its automated titration systems, and the acquisition of balance manufacturer Microwa AG. Mettler acquired its 500-employee competitor August Sauter KG, of Albstadt - Ebingen , Germany, in 1971, for its specialized industrial and retail scales.
Developed by Bausch & Lomb and launched in 1953, the Spectronic 20 was the first low-cost spectrophotometer. [5] It rapidly became an industry standard [7] due to its low cost, durability and ease of use, [8] and has been referred to as an "iconic lab spectrophotometer". [9] Approximately 600,000 units were sold over its nearly 60 year ...
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