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Presentation - UV-Vis Spectrometric Titrations (Using...

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Click to edit Master subtitle style 5/24/11 UV-Vis Spectrometric Titrations (Using UV-Vis Spectroscopy to monitor titration progress)
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5/24/11 Titration Goal: Determine concentration of analyte. Via: 1) Known volume of standardized reagent (titrant) is added to unknown sample (titrand) 2) Use stoichiometry of titration reaction to calculate analyte
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5/24/11 UV-Vis Spectroscopy - Theory Useful for analysis of metal complexes, organic molecules containing chromophores (especially conjugated systems) Molecular orbitals of different symmetries and some with energy differences corresponding to UV/Vis range Absorption of light of appropriate energy can cause an electronic transition from ground to excited state
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5/24/11 UV-Vis Spectroscopy - Theory Probability of an electronic transition depends on selection rules and wavelength (and other factors like solute-solvent interaction) Spin selection rule: ∆S=0 (spin allowed) Laporte selection rule: ∆l=±1 Various mechanisms relax these
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This note was uploaded on 05/24/2011 for the course CEM 311 taught by Professor Dave during the Spring '11 term at UBC.

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Presentation - UV-Vis Spectrometric Titrations (Using...

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