Look at Figure 2. It’s an ad for a miniature mass spectrometer. 1. Is it a quadr

Question

Look at Figure 2. It’s an ad for a miniature mass spectrometer.

1. Is it a quadrupole mass spectrometer?

2. How long is it? (Look at the ad carefully; the length isn’t explicitly stated, but there is a clue given.)

3. What ranges of m/z can this instrument detect?

4. Will you be able to use it to detect proteins?

5. What is the highest m/z at which you can be sure you will be able to separate ions different in m/z by 1 amu? For instance, will you be able to separate 60 from 61? 129 from 130?

6. Can you separate the parent ions for nonane (MW 128.0157) and naphthalene (MW 128.0628)? Justify your answer.

Explanation / Answer

From the given drawing of miniature mass spectrometer shown above,

1. The mass spectrometer shown above is a quadryple mss spectrometer.

2. The length of the spectrometer is approximately 90 inch.

3. An m/z mass of range upto 1-1500.

4. Smaller proteins which fit this range is detectable with this machine.

5. Sensitivty range suggests we may be able to identify peaks woth a difference of m/z 1

6. Separation of nanone and naphthalene might be a bit difficult with this instrument with the given sensitivity limits.

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