Atomic AbsorptionSlide 2Photo absorption/emisionSlide 4Lamps are SpecialAerosol FlowIntensity vs Wavelength in AAAnalysisGraphite furnace AAOther AA’sAtomic Emission SpectroscopySpectrometerX-ray FluorescencePotential X-ray EmissionsGeneration of X-raysXRFXRF DetectorsXRF AnalysisAtomic AbsorptionTerry A. RingChemical EngineeringUniversity of UtahE= -13.6 eV Z2/n2Photo absorption/emisionAtomic AbsorptionLamps are Special•Cathode with receptacle for material •Vapor of Material to be analyzed•Vapor Excited by plasma•Light of particular wavelengthAerosol Flow•Burner Fuel (& oxidizer) mixed with aerosol of sample•Sample asperated into burner •Flame ionizes SampleIntensity vs Wavelength in AA•Light Source•Absorbance•Monochromatic•DetectorAnalysis•Absorption of Light•Electrons are excited•Light Intensity on detector is lessGraphite furnace AAOther AA’s•Flame•Spark•Arc•Plasma•Laser•X-rayAtomic Emission Spectroscopy•Flame is used to generated Atoms with excited electrons and ions•Light is filtered in spectrometer to give Intensity vs wavelengthSpectrometer•Emitted Light•Broken into different color components–Prism–GratingX-ray Fluorescence•Two Steps–Absorption of X-ray•Elimination of electron for k or L shell–Collapse of M shell electron to fill hole•Light emission (x-ray)Potential X-ray Emissions•From K shell hole–K, K, K, –Zeeman Effect - 1, 2, 3•From L shell hole–L, L, L,Generation of X-rays•High Voltage Electrons•Electron Scattering•Electron Absorption–X-ray photo ionizationXRF•Energy-dispersive XRF•Wavelength-dispersive XRFXRF Detectors•Energy-dispersive XRF–Semiconductor•Wavelength dispersive XRF–Scintilation CounterXRF Analysis•Samples can be in any
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