CHEM 420
University Of Illinois - Urbana-Champaign
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University of Illinois, Urbana Champaign - CHEM 420 Exam 3 Answer Key. 100% VERIFIED
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1. (12 points) For each comparison, circle the harsher ionization method.
(4 points each)
a. Chemical ionization (CI) or Electron Impact (EI)
b. Chemical ionization (CI) or Matrix-assisted laser desorption (MALDI)
c. Electrospray ionization (ESI) or Electron Impact (EI)
2. (8 points) What is the most fundamental difference between gas phase and desorption-based ionization methods?
What limit does this place on species to which gas phase techniques can be applied? Name one example of each.
...
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University of Illinois, Urbana Champaign - CHEM 420 Exam 3 Answer Key. 100% VERIFIED
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1. (12 points) For each comparison, circle the harsher ionization method. (4 points each) a. Chemical ionization (CI) or Electron Impact (EI) b. Chemical ionization (CI) or Matrix-assisted laser desorption (MALDI) c. Electrospray ionization (ESI) or Electron Impact (EI) 2. (8 points) What is the most fundamental difference between gas phase and desorption-based ionization methods? What limit does this place on species to which gas phase techniques can be applied? Name one example of each. ...
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