Quantitative Chemical Analysis Seventh Edition Quantitative Chemical Analysis Seventh Edition...

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Transcript of Quantitative Chemical Analysis Seventh Edition Quantitative Chemical Analysis Seventh Edition...

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  • Quantitative Chemical Analysis Seventh Edition Quantitative Chemical Analysis Seventh Edition Chapter 19-21 Atomic spectroscopy Applications Copyright 2007 by W. H. Freeman and Company Daniel C. Harris
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  • Light has: Intensity Color (wavelength) Polarization
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  • E = h
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  • o
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  • The fraction of atoms in the excited state is still less than 0.02%, but that fraction has increased by 100(1.74 1.67)/1.67 = 4% The fraction of atoms in the ground state is still more than 99.98%, and that fraction has increased by 100x7x10 -6 /.9998 = 7x10 -4 %
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  • Linewidth
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  • ATR
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  • Fourier transform IR
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  • Electromagnetic Radiation Polarization
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  • Unpolarized light Polarization
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  • Polarized light Polarization
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  • Polarizing sun glasses reduce glare of polarized reflections from surfaces Polarization
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  • (b) Polarization
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  • Mirror image of hand Polarization
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  • Optical Isomer and Interaction with Light Enatiomers rotate the plane of polarized light. Dextrorotatory- d isomer Complex which rotates plane of polarized light to the right. Levorotatory- l isomer Complex which rotates plane of polarized light to the left. Chiral molecules are optically active because effect on light Polarization
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