Quadrupole ion trap

A quadrupole ion trap is a type of mass spectrometry device used to trap and analyze ions based on their mass-to-charge ratio. It utilizes an electric field generated by four rod electrodes arranged in a quadrupole configuration to confine ions in a three-dimensional space. Here's how it works: ### Structure: 1. **Four Rods**: The quadrupole ion trap consists of four parallel rods.