When electromagnetic radiation in the ultraviolet (UV) or visible region of the spectrum is absorbed by a molecule, π or non‐bonding (n) electrons are promoted into antibonding orbitals. Because the main electron transitions are π→π* transitions, the absorption of energy in the UV or visib...
- Ultraviolet-VisibleSpectrum 紫外-可见光谱法也称紫外-可见分光光度法。是利 用物质的分子对紫外-可见光区辐射的吸收来进行定性、 定量及结构分析的方法。 一、紫外光谱的基本原理 分子中价电子经紫外或可见光照射时,电子从低能 级跃迁到高能级,此时电子就吸收了相应波长的光,这 样产生的吸收光谱叫紫外-可见光谱...
referstoabsorptionspectroscopyorreflectance spectroscopyintheultraviolet-visiblespectralregion.Thismeansituseslight inthevisibleandadjacent(near-UVandnear-infrared(NIR))ranges.The absorptionorreflectanceinthevisiblerangedirectlyaffectstheperceived colorofthechemicalsinvolved.Inthisregionoftheelectromagneticspectrum, ...
Ultraviolet and visible spectroscopy deals with the recording of the absorption of radiations in the ultraviolet and visible regions of the electromagnetic spectrum. The ultaviolet region extends from 10 to 400 nm. It is subdivided into the near ultraviolet (quartz) region (200–400 nm) and the...
This constitutes the diffuse reflectance spectrum.doi:10.1016/S0070-4571(08)70020-7Robert A. SchoonheydtElsevier Science & TechnologyDevelopments in SedimentologySchoonheydt, R.A. 1982. Ultraviolet and visible light spectroscopy. In J.J. Fripiat (ed.), Advanced Techniques for Clay Mineral Analysis ...
Ultraviolet and Visible Light SpectrometersUltraviolet and Visible Light SpectrometersspectrometergratingprisminterferometerspectroscopyabsorptionA wide variety of instruments exist for recording the intensity of light as a function of wavelength. In the visible and ultraviolet regions of the spectrum, these inclu...
1.Kinetic degradation process of PAn films during aniline polymerization was in situ monitored by UV-Visible absorption spectrum.采用紫外可见吸收光谱法现场监测了苯胺电化学聚合时的动力学降解过程,简单、直观地显示了阳极电位、酸度和苯胺浓度对降解过程的影响,结果表明,阳极电位越正、酸度越强、苯胺浓度越大,聚...
Other articles where ultraviolet-visible spectrophotometry is discussed: chemical analysis: Ultraviolet-visible spectrophotometry: Absorption in the ultraviolet-visible region of the spectrum causes electrons in the outermost occupied orbital of an
5) UV-Vis-NIR diffuse reflectance spectrum 紫外-可见-近红外漫反射光谱6) DRUV-VIS 漫反射紫外-可见光谱(DRUV–VIS)补充资料:紫外和可见光谱 紫外和可见光谱 Ultraviolet and Visible Spectrophotometry 紊外和苛{茗先谱Ultraviolet分析方法。and Visible SPeetrophotometry见 说明:补充资料仅用于学习参考,请勿...
1) ultraviolet-visible spectrum 紫外可见电子吸收光谱2) UV-VIS absorption spectrum 紫外-可见光吸收光谱 1. This paper was based on quantitative analyzing tested by XRF and coloration mechanism study tested by UV-VIS absorption spectrum,it was found that the main components of synthetic blue and ...