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March11_2005_2pp

March11_2005_2pp - Exam#2 Next Wednesday(7 pm B104 Review...

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1 March 11, 2005 ¾ Exam #2 ¾ Next Wednesday (7 pm, B104) ¾ Review Session: Sunday, 7pm, B203 ¾ Info Page now online ! ¾ Prob Set #3 Solutions now online ! ¾ With Real Blueberry Bursts (artificially flavored)! ¾ Office Hours modifications this week ¾ Friday: 1:15 – 1:45 pm (A223 Cook) 2 Qualitative Analysis Group Frequencies:
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3 More Qual Analysis Must have spectrum of a pure compound Use group frequencies as a guide Use correlation chart for more compound specific functional group analysis Use computerized spectral search engines Use IR assignments in conjunction with other info (e.g., chemical, physical, spectroscopic) 4 Quantitative Analysis The Good Side: -Almost all compounds absorb in IR -solids, liquids and gases are all accessible The Problems: Poor sensistivity and short cell pathlengths mandate relatively high solution concentrations (1-2% or more) results in Beer’s Law deviations Narrow absorption bands and complex spectra (with overlapping bands) can cause polychromatic errors
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5 Accurate Absorbance
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  • Spring '10
  • JoelGoldberg
  • Atomic Absorption and Emission Spectrometry, IR Spectrometry Applications, Accurate Absorbance Measurements, concentration Atomic Absorption, Np Emission Int.

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