Mass Spectrometry

Question 1

What does a mass spectrometer measure?

Answer 1

1) Mass of each ion
2) Number of positive charges
3) Number of ions

Question 2

What are the 2 types of magnetic deflection analyzers?

Answer 2

1) Fixed magnetic sector deflection
2) Variable magnetic sector deflection

Question 3

A __________ mass filter consists of two pairs of electrically connected parallel rods

Answer 3

Quadrupole

Question 4

What are the 2 types of ion detectors used in mass spectrometers?

Answer 4

1) Electron multiplier
2) Faraday cup detector

Question 5

What are the 2 advantages of short run times?

Answer 5

1) Mass spectrometers provide composition data that responds quickly to process changes
2) One mass spectrometer can be used to analyze multiple streams

Question 6

What concentrations of gas do mass spectrometers typically measure?

Answer 6

0.1% to 1 ppm