Lab 2: Mass spectroscopy

Using mass spectrometry information about for instance pollutants in the surrounding atmosphere can be obtained.

A Quadrupole Mass Spectrometer (QMS) consists of gas inlets, vacuum pumps, and a detector unit, as shown above.

Task 1

Investigate how a QMS works by studying what parameters have to be used to let ions pass through the QMS, hitting the last detector. Start with fluorine (F) m=19 amu. In the link below you can do the simulation by setting the angle to 90 degrees, the DC voltage to 40 V. Try different AC voltages to make the ions pass the instrument. Determine the AC voltage interval which will give you a mass resolution of 1 amu. Use Virtuella laborationer, Massspektroskopi, to perform a QMS simulation. 

Task 2

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