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Chem 155 <strong>Final</strong> review topics and questions: 24. Elaborate the following acronyms: e. ATR – Attenuated Total Reflection f. FTIR – Fourier Transform Infrared 25. Which will be observed at a higher frequency the OH stretch in ethanol or the OD stretch in deuterated ethanol k OH Because H is lighter than D and v where k = bond force constant and µ = reduced mass of oscillator. 26. In an FTIR, high resolution corresponds to: g. Long interferometer drive h. High beam intensity i. High absorbance j. High mirror velocity k. Double-beam optics 27. Fill in the following to indicate the transitions involved in Stokes and anti-Stokes Raman scattering: S1 So
Chem 155 <strong>Final</strong> review topics and questions: 28. Fill in the following table: Mass analyzer Resolution (high or low) Input: Continuous / pulsed Cost (high or low) Quadrupole Low Continuous Low Double-focusing High Pulsed High electric / magnetic sector. Time of flight. High Pulsed High 29. Fill in the following table: Ionization Source Fragmentation (high or low) Electron Impact High (EI) Mode: Continuous / pulsed Cont. Chemical ionization (CI) Matrix Assisted Laser Desoprtion Ionization (MALDI) Electrospray Ionization (ESI) Low Low Low Cont. Pulsed Cont.
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Final Prep Answers

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