好像有人要 我就po上來了
1/3
1. Laser desorption TOFMS has better resoln. than GC-TOFMS, why?
2. List the advantages of using a NMR with higher magnetic field
3. describe the nonspectroscopic interference in ICP-MS
4. In surface analysis, very often, one or both primiary and secondary
beam is made up of e. why?
1/10
1. How to discriminate Auger e from photoelectron in XPS?
2. Why the homogenity and stability of mag field are very important
issues in NMR?
3. Describe the resonance ion injection mode in ion trap MS,
and explain why it's better than mass selective instability mode.
1/14
1. a. Draw Q-TOF MS instrument and explain it.
b. Q-TOF is better than QQQ in protein analysis, why?
2. a. In NMR, why use a solvent containing deuterium?
b. Describe the funtion of shimming coils.
3. In Auger electron spectroscopy, why do we use a "differential"
energy as the ordinate in our spectrum?
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