Fundamentals of UV-Visible Spectroscopy (5965-5123E)
In UV-visible spectroscopy, wavelength usually is expressed in nanometers (1 nm = 10-9m) It follows from the above equations that radiation with shorter wavelength has higher energy In UV-visible spectroscopy, the low-wavelength UV light has the highest energy In some cases, this energy is sufficient to cause unwanted photochemical
UV-VIS Absorption spectroscopy (Electronic spectroscopy)
UV-Vis absorptions features: a Transitions between electronic energy levels are induced by electromagnetic radiation in the UV-Visible region b Within each electronic state are a series of vibrational and rotational levels All molecules give electronic spectra (contrary to vibrational and rotational spectroscopies)
Chapter 1: UV-Visible & Fluorescence Spectroscopy
1 1 UV-Visible Spectroscopy UV-Visible absorption spectroscopy involves measuring the absorbance of light by a compound as a function of wavelength in the UV-visible range When a molecule absorbs a photon of UV-Vis light, the molecule is excited from its ground state to an electronic excited state In other words, an electron is
Determination of wine colour by UV-VIS Spectroscopy following
Double Beam Spectrophotometer: UV-1800 2 x 10mm quartz cuvettes UV-Probe software allowing direct calculation of I & T in software Result of Sudraud method in a UVProbe 9 software table , This is the absorption spectrum of a red Italian table wine ³FRORUHURVVRUXE LQR´ Volume measured with UV - 1700
Chapter 13 Spectroscopy NMR, IR, MS, UV-Vis
NMR, IR, MS, UV-Vis Main points of the chapter 1 Hydrogen Nuclear Magnetic Resonance a Splitting or coupling (what’s next to what) b Chemical shifts (what type is it) c Integration (how many are there) 2 13C NMR 3 InfraRed spectroscopy (identifying functional groups) 4 Mass spectroscopy (determining molecular weight, structural
Fundamentals de la Spectroscopie atomique: Hardware
spectroscopie atomique Introduction Classification Table des matières ATOMES Spectroscopie atomique • SAA • MP-AES • ICP-OES • ICP-MS MOLÉCULES Spectroscopie moléculaire • UV-VIS • UV-VIS-PIR • FTIR • Fluorescence CRISTAUX • Cristallographie à rayons X NOYAUX • Résonance magnétique nucléaire
Principles of FTIR Spectroscopy - Chemistry
Principles of Diffuse Reflectance Method K is the absorption coefficient, and S is the scattering coefficient In practice, the comparative reflectance
1 Basic Principles of Fluorescence Spectroscopy
energies of quanta in the visible region Wavelength (m) Wavenumber (cm-1) Frequency (Hz) Energy (kcal) 10-13 1011 1021 108 10-11 109 1019 106 10-9 107 1017 104 10-7 105 1015 102-5 103 1013 100-3 10 1011 10-2-1 10-1 109 10-4 10-3 107 10-6 Gamma rays X- rays IR Microwave Radio Visible UV Figure 1 1 The electromagnetic spectrum 2j 1 Basic
Raman spectroscopy
1) UV lasers 2) visible lasers 3) NIR lasers Common excitation wavelengths 244 nm- biological, catalysts (Resonance Raman) 325 nm- wide bandgap semiconductors 488 nm & 514 nm- semiconductor, catalysts, biological, polymers, minerals & general purpose 633 nm- corrosion & general purpose 785 nm - polymers, biological & general purpose 830 nm
[PDF] spectroscopie uv visible application
[PDF] spectroscopie uv visible pdf
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