Talk:Quadrapole

A device used in particular mass spectrometers to conduct and focus the beam of the ions. The ions could have been generated in an ionization source such as electron ionization (EI), electrospray ionization (ESI) atmospheric pressure chemical ionisation (APCI) etc.. The beam of ions are shaped in the quadrapole by applying a magnetic field on four parallel steel rods. In more sophisticated instruments up to three quadrapoles might be implemented in a row to focus the beam, dissociate ions, initiate impacts in the molecular level or to scan a mass range to produce the mass spectrum.