Question

Q1. 2-D quadrupoles

a. are typically used for high resolution, accurate mass experiments

b. are typically used for low resolution, high sensitivity experiments

c. are typically coupled to MALDI ion sources

d. are used with helium to cool ion motion to the center of the rods

Q2. An operating line

a. defines the ratio of RF and DC voltage used to make the quadrupole a mass spectrometer

b. defines the mass resolution of the instrument

c. regulates the ions that have stable trajectories through the rods

d. all of the above

Q3. A triple quadrupole mass spectrometer

a. operates at ultra-high vacuum (<10^-8 Torr)

b. are the most common type of tandem mass spectrometer

c. operate at high (kV) source voltage

d. none of the above

Q4. In RF-only mode, quadrupole filters

a. aid in transmitting ions from one place to another

b. are used as mass-selective devices

c. are better at trapping than hexapoles

d. are rarely used in mass spectrometry