March16_2005_2pp

March16_2005_2pp - March 16, 2005 Exam #2 TONIGHT! B104...

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1 March 16, 2005 ¾ Exam #2 ¾ TONIGHT! ¾ B104 Angell ¾ 7 pm ¾ Physics SEMINAR: “Photoelectron Resonance Capture Ionization Mass Spectrometry: Analysis of Atmospheric Organic Particles” -Professor±Petrucc i Today, 4 pm, A442 Cook 2 Flame-AAS versus GFAAS Flame-AAS GFAAS - Continuous -Pulsed/Transient - 1-5% sample consumption -100% sample consumption -mLsamp les -μL ±samp les - short residence time (ms) -long residence time (sec)
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3 Sources ± Need a narrow line source . . . . Why? -Atomic spectral features are very narrow (linewidths typically < 10 -2 Å) -Continuum source neccesitates monochromator with ∆λ eff < 10 -3 Å . . . not easily done! -So, need a source which can provide emission at discrete wavelengths with linewidths less than those found in flame or graphite furnace atom cells 4 Hollow Cathode Lamps
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This note was uploaded on 05/15/2010 for the course CHEM 221 taught by Professor Joelgoldberg during the Spring '10 term at UVM.

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March16_2005_2pp - March 16, 2005 Exam #2 TONIGHT! B104...

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