How does a quadrupole ion trap work?
Ions enter the quadrupole ion trap through the entrance endcap electrode. The ions are then trapped in the space between the electrodes by AC (oscillating, nonstatic) and DC (nonoscillating, static) electric fields. Various voltages are applied to the electrodes to trap and eject ions based on their m/z.
What is the difference between ion trap and quadrupole?
A quadrupole filter only measures the ion current for a specific mass-to-charge ratio, while all other mass-to-charge ratios are discarded. In general, an ion trap is more sensitive and can scan a mass range faster than a quadrupole instrument.
How does quadrupole mass spectrometry work?
This type of mass analyzer separates ions based on the stability of their flight trajectories through an oscillating electric field in the quadrupole. The field is generated when a radio frequency (RF) voltage is applied between one pair of opposing rods within the quadrupole.
What is linear trap quadrupole?
The linear ion trap uses a set of quadrupole rods to confine ions radially and a static electrical potential on-end electrodes to confine the ions axially. The linear form of the trap can be used as a selective mass filter, or as an actual trap by creating a potential well for the ions along the axis of the electrodes.
How does a Penning trap work?
Penning traps use a strong homogeneous axial magnetic field to confine particles radially and a quadrupole electric field to confine the particles axially. The static electric potential can be generated using a set of three electrodes: a ring and two endcaps.
What advantages do quadrupole mass Analysers have over sector instruments?
Quadrupole mass analyzers have several advantages such as no requirement for very high vacuum (> 10−7 Torr), and their relatively fast and simple operation for high-throughput analysis. Disadvantages include low transmittance, a low m/z cutoff, and low (generally unit) resolution.
What is the notable advantage of the quadrupole mass spectrometer?
What is Q TRAP?
The Q Trap system is a hybrid Triple Quadrupole/Linear Ion Trap mass spectrometer. Different from conventional quadrupole, the Q3 of the Q Trap MS can work as either a standard quadrupole mass filter or a linear ion trap (LIT) with higher sensitivity than traditional 3D ion trap.
What is the difference between single and triple quadrupole?
Single quadrupole systems contain only one mass filtering quadrupole while triple quadrupole systems consist of three quadrupoles.