Ion-Trap Mass Spectrometry

Introduction

The ion-trap mass spectrometer uses three electrodes to trap ions in a small volume. The advantages of the ion-trap mass spectrometer include compact size and the ability to trap and accumulate ions to increase the signal-to-noise ratio of a measurement.

Instrumentation

The mass analyzer consists of a ring electrode separating two hemispherical electrodes. A mass spectrum is obtained by changing the electrode voltages to eject the ions from the trap.

Related topics:

• Mass spectrometry (Intro)
• Ionization methods
• Ion detectors